Martin dating by serial number
The early 70s models (1970 -1975) can be distinguished by a more squared peghead, shaped similarly to that of a "spatula." The logo consisting of a gold decal with the single word in block lettering SIGMA surmounted with the Σ symbol (the Greek letter sigma), in mother of pearl. In 1978, model designations were added to capitalize on Martin model numbers: the DM-18, DM-19, DR-28, DR-28H, DR-35, DR-41, and DR-45. Pegheads & Logos Sigma guitars made in Japan from 1970 through 1983. Details about dates, transitions, exceptions, and other nuances can be found in the Shirley/Vanderlinden book, Browning Auto 5 Shotguns. 1909 1 - 32001910 to 1914 There is only vague info about 16 ga SNs in SV (page 74) for the time 1910 to 1914. "65101 – 827501930 Barrel Address (US market) BROWNING ARMS COMPANY ST LOUIS MO.New choke codes replaced the choke words stamped on the barrels.
Track/pista frames are not included in this registry. A TIPO RONDINE decal may or may not appear on some older Olmo bikes, and refers to the Agrati AM lugs, with 'rondine' meaning 'swallow.' Some older Olmos have the ornate Agrati lugs which Emilio Bozzi sold as Brianza sportiva lugs; the accompanying Agrati rear dropouts are stamped with a scalloped back. Campagnolo crank arms have a date code starting in 1973, consisting of a diamond (1970's) or circle (1980's) with a number in the center denoting the last digit of the year of manufacture, and then in 1985-9 with square and number in the center: 11 = 1985, 21 = 1986, 31 = 1987, 41 = 1988, 51 = 1989 plus some other examples. after the year of an Olmo in this registry designates uncertainty about its year or range of years.); does not have swallow rondine lugs; chrome forks; Campagnolo Cambio Corsa dropouts and fork ends DECALS: head tube and seat tube decals are Olmo 'Lazy L' star logo.OLMO with red background on left side of top tube is unfamiliar on other Olmos.This guide, then, confines itself to York instruments made in the Grand Rapids factory.