History of the Mid-Century Modern Mailbox

Posted by Joanna on

The mid-century modern mailbox appeared around 1960, when Sears, Montgomery Ward and manufacturers like Leigh Products and Fulton began selling low, flat-topped, two-tone steel curbside boxes to match the ranch houses and post-and-beam moderns of the postwar suburbs. It was a deliberate break from the arched "tunnel" box that Post Office engineer Roy Joroleman had designed in 1915 and that rural Americans had been required to use ever since. The Post Office recognized the new form as a "contemporary" class by the early 1960s, dozens of makers produced it through the 1970s, and then consolidation in the mailbox industry killed it: by 2001 only three of the 29 makers approved in 1970–74 were still in business, and Fulton's contemporary "Sleek Suburban," one of the last survivors, went out of production in 1993. Modbox revived the form in 2014.

Key facts

  • 1896: Rural Free Delivery begins; farmers use lard cans and crates as mailboxes.
  • 1901–02: Post Office sets the first standards — metal, weatherproof, a flag, at least 6" × 18".
  • 1915: Roy Joroleman designs the arched tunnel box; unpatented, so anyone can make it.
  • 1929: the larger No. 2 box becomes the standard for Parcel Post.
  • 1960–61: Sears catalogs offer a flat-topped, two-tone "heavy-gauge steel" box with an angled post.
  • 1962: Post Office introduces "contemporary" style size categories (C1, C1A, C2).
  • 1964: Sears replaces the aluminum flag cap with a slotted flag.
  • 1970: 22 approved mailbox manufacturers; 29 across 1970–74.
  • 1978: the Joroleman-design requirement is lifted.
  • 1993: Fulton stops making its contemporary box.
  • 2001: only three of the 1970–74 makers remain; USPS adopts performance-based standards.
  • 2014: Modbox reproduces the mid-century form; design patents issued 2015.

Before the mailbox: Rural Free Delivery

Until the 1890s, rural Americans collected their mail in town. Rural Free Delivery began as an experiment in 1896, and farmers improvised receptacles at the road — lard cans, feed crates, soap boxes — which carriers hated. By 1901 the Post Office required purpose-built boxes: metal, weatherproof seams, a signal flag, minimum dimensions of about 6" × 18", mounted at a height a carrier could reach from a vehicle. In 1902 the standard was refined to rectangular boxes at least 18" × 6" × 6" or cylindrical boxes at least 18" × 6". Patrons who didn't comply were threatened with loss of service.

1915: Joroleman's tunnel box

In 1915 the Post Office's Roy J. Joroleman designed a box that would settle the question for six decades: a half-cylinder of painted sheet steel over a flat floor, with a curved front door and latch and a flag on the side. The arch shed rain and snow; the construction — two rivets, three bolts, four fasteners — was cheap. Joroleman left it unpatented so any manufacturer could produce it, and in 1915 the Post Office approved two sizes: No. 1 (18½" × 6¼" × 7½") and No. 2 (23½" × 11" × 14") for Parcel Post users. From 1915 to 1978, rural mailboxes were expected to follow Joroleman's design. The larger No. 2 became the only approved size in 1929, and No. 1 was reintroduced in 1936; in 1953–54 the Post Office refined both and added a medium No. 1A.

The postwar suburb and the problem with the tunnel box

The 1950s put curbside delivery in front of millions of new houses that had nothing to do with the farm. Ranch houses, split-levels and Eichler-style post-and-beam moderns — with carports, flat or low-pitched roofs, and exterior color schemes of muted bodies and bold accent doors — were being served by a galvanized barrel on a 4×4 that looked like it belonged beside a silo. Mailboxes were among the last exterior objects to be redesigned, but by the end of the decade, manufacturers and the big catalog retailers had noticed.

1960–61: Sears and the two-tone box

The earliest dated example Modbox has found is in a fall 1960 Sears catalog. Sears' Spring–Summer 1961 Diamond Jubilee catalog (the company's 75th anniversary) presents the form fully developed: a "heavy-gauge steel" box with a "baked enamel finish… tougher than your lawn mower finish," an aluminum door handle and an aluminum cap on the flag assembly, two-tone colors (a smaller model in light blue over white), laboratory tested by Sears, and an angled steel post shown in a catalog inset. The copy promised to replace "the 'old look' in R.F.D. boxes throughout the United States." Sears offered the style through at least 1978; in 1964 it replaced the flag cap with a slotted flag mechanism, which is how collectors date surviving boxes.

1962–1970: the Post Office names it "contemporary"

The Post Office's response was fast. In 1962 it introduced size categories for a "contemporary" style — C1, C1A and C2 — based on parcel capacity rather than the fixed dimensions of the traditional sizes. By 1970 the Postal Service's approved-manufacturer list carried 22 companies, and a 2001 Postal Bulletin still described "two approved styles of curbside mailboxes: (1) traditional design… and (2) contemporary design." The mid-century modern mailbox, in other words, has had an official name for more than sixty years.

The makers

Sears and Montgomery Ward sold contemporary boxes under house brands; behind them were manufacturers such as Leigh Products of Michigan — whose two-tone box is one of the direct references for Modbox — and Fulton Corporation, in business since 1906, which made its "Sleek Suburban" into the early 1990s. Across 1970–74 USPS listed 29 approved makers. Late-1960s magazine advertising and 1970s catalogs show variations on the same vocabulary: rectangular body, sloped top, two-tone enamel, aluminum hardware.

1978–2001: consolidation and disappearance

In 1978 the Post Office lifted the requirement that rural boxes follow Joroleman's design, which in principle freed manufacturers to innovate. In practice the market went the other way. The mailbox business consolidated into a few high-volume producers, and multi-part, two-tone contemporary boxes appear to have been among the first casualties. Fulton stopped making its contemporary model in 1993 and no longer has the dies. By a 2001 Postal Bulletin only three of the 29 makers listed in 1970–74 were still producing mailboxes, and Gibraltar Industries (Solar Group) had since absorbed two of them. (Assembly instructions for a Leigh box carry a Solar Group imprint, which suggests Leigh was one, but we haven't confirmed it.) The same year USPS replaced fixed size classes with performance-based standards (USPS-STD-7B), keeping the Traditional and Contemporary categories and adding a locking variant.

2013–2015: the revival

In 2013 a mid-century enthusiast renovating his own house went looking for a period-appropriate mailbox and found none. A 2013 Atomic Ranch article had observed that "the retro market seems to be wide open." Over the following year he documented the research on this blog: 1960s Sears and Montgomery Ward catalog scans, a vintage patent search, a Leigh box bought on eBay, a Fulton box, correspondence with Fulton, and the USPS approved-manufacturer lists. He designed a reproduction in SolidWorks that took "the best design elements from the various manufacturers over the 20 year period," matched the colors to original Eichler exterior accent palettes documented by the Eichler Network, and launched Modbox on Kickstarter in 2014. The wall-mounted version followed on Kickstarter in 2015, and U.S. design patents D736,490 (mailbox, August 11, 2015) and D739,115 (mailbox and post, September 15, 2015) were issued. Powder coating was brought in-house in 2018. The company changed hands in 2024 and continues to build the boxes to order in the USA.

Timeline

Year Event
1896 Rural Free Delivery experiment begins
1901–02 First Post Office mailbox standards
1915 Joroleman tunnel box; No. 1 and No. 2 sizes approved
1929 No. 2 becomes sole approved size
1936 No. 1 reapproved
1953–54 Sizes refined; No. 1A added
1960–61 Sears catalogs offer flat-top two-tone box with angled post
1962 Post Office introduces "contemporary" size categories
1964 Sears replaces flag cap with slotted flag
1970 22 approved manufacturers listed
1978 Joroleman-design requirement lifted
1985 Traditional and contemporary styles each in sizes 1, 1A, 2
1992 T1–T3 / C1–C3 sizes unified for city and rural
1993 Fulton ends contemporary box production
2001 Three makers remain; USPS-STD-7B performance standard
2013–14 Modbox research and Kickstarter
2015 Design patents D736,490 and D739,115; USPS-STD-7C
2018 Modbox brings powder coating in-house
2022 Locking models introduced
2024 Modbox under new ownership

Where Modbox fits

Modbox exists because of this history. The curbside box reproduces the 1960–61 form at its original proportions in modern materials — 20-gauge galvannealed steel, powder coated inside and out — with the aluminum flag cap and door pull that Sears dropped in 1964, and a 65° angled post from the 1961 catalog inset, in colors matched to Eichler accent palettes. The research archive from 2013–14 remains on this blog under Mailbox History & the Modbox Story.

Frequently asked questions

Who invented the mailbox? No one person invented the mailbox, but Roy J. Joroleman, a Post Office engineer, designed the standardized American rural mailbox in 1915.

When did mid-century modern mailboxes come out? Around 1960; the earliest dated catalog example is fall 1960, and Sears' 1961 Diamond Jubilee catalog shows the fully developed form.

Why did USPS call them "contemporary"? To distinguish non-dome designs from the "traditional" Joroleman form when it created size categories for them in 1962. The terms are still used in USPS-STD-7C.

Are any of the original manufacturers still making them? No. Fulton still made mailboxes as of 2013 but ended its contemporary model in 1993; Leigh appears to have been absorbed into Gibraltar Industries' Solar Group. Modbox's reproduction, launched in 2014, is the current source.

Sources

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