Steel

The steel cased 1675s are the classic GMT-Master and were made throughout all years of the model run (1960-1979). This model is referred to technically as the 1675/1 GMT-Master I, with the “/1” denoting steel; 1675/3 is the technical reference denoting the steel/gold cased version and 1675/8 the gold version. Notably, the 1675/3 and 1675/1 from the 1970s share some components and differ in others, as shown in the table below. This table only applies to the 1970s watches as the 1675/3 was not produced in the 1960s.

Part1675/3
(Steel / gold)
1675/1
(Steel)
Same?
DialBrown or Black NippleBlack matteNo
HandsetGoldSteelNo
BezelGoldSteelNo
InsertBrown and gold (brown dials) or Black (black dials)Red/blue or blackBlack with silver writing can be seen on both models
MidcaseSteelSteelYes
CasebackSteelSteelYes
CrownGoldSteelNo
Date wheelWhiteWhiteYes (also shared with gold model)
CrystalT116T116Yes (also shared with gold model)
Movement15751565 (pre-1965) & 1575 (post-1965)Yes
(within accepted SN ranges)
BraceletTwo tone jubilee or oysterSteel jubilee or oysterNo

The steel model is split into two eras based on the types of dials used. The early dials were produced from 1960-1967 and are glossy (referred to as “gilt” dials), while the later dials produced from 1966-1979 are matte in appearance; both matte and gilt dials were produced in 1966-1967. Below are links to the dials available for the 1675/1. You can find the dials available for the 1675/3 and 1675/8 by going to the “Steel and Gold” and “Gold” menu headers, respectively.

  1. Gilt
  2. Matte