I resumed building custom frames under my own name in 1981 while working for Masi. In 1982 I went full time building my own frames, renting space in the Masi shop.

In 1983 I opened my own frameshop in San Marcos, which is in San Diego County, California. In 1986 I moved the business 60 miles north to Temecula, in Riverside County, California.

The frames still said Worcester, England under my headtube logo, in much the same way that the Masi frames said "Masi, Milano" even though they were built in California. However, the frames did have another decal (Above.) that stated that the frames were built in California.

From 1982 onwards the frames had my name engraved on the top left side of the bottom bracket shell, and my four "Ms" logo was engraved in the fork crown.

The frame numbers of US built frames reflected the date it was built. The first digit was the month, 1 though 9 for January through September; then a letter “O” for October, “N” for November, and “D” for December. (*A frame built in Oct 1981 was stamped 10811.)

The next two digits was the year, and the last digit was the number frame built that month. For Example 7843 would be July 1984 and the 3^rd frame built that month.

I still have my frame number record book for American built frames, and all frames can be authenticated like the UK built frames by matching what is written in my book. For example the number I just gave above does not exist, there was no such number frame built.

Dave Moulton

Below: The number after a name indicates more than one Dave Moulton built frame in the owner's colection.

Numbers in Blue are linked to pictures on an offsite webpage.

A registry of custom bicycle frames built by Dave Moulton in San Marcos and Temecula, CA between 1981 and 1993