Tissot 27-7

Tissot cal: 27 of the first generation was introduced in 1936 and was manufactured until 1949. The movement shared some parts with Omega cal: 26,5 (100), as winding stem, setting lever spring, winding pinion, clutch wheel, setting wheel, minute wheel and the wheel train are the same. During the manufacturing, modifications were made, see list below. We heve not found any documentation for this movement (27-7) its have the super shock resist instead of shock resist and a bewelled plate, the manufacturing number: 2 068 638 indicates that it was produced in 1948.

Data: Tissot 27-7

• 15 Jewels manual wind, sub second.
• Size: 12''' 26,50 mm.
• H: = 4,05 mm.
• N: = 18000.
• Power reserve: 43 h.

Versions:

• 27: sub second. no shock protection.
• 27 PC: sub second, shock resist.
• 27 PC SC: sweep second, shock resist.
• 27-1: sub second, incabloc. (1949 - 1951).
• 27-2: sweep second. (1936 - 1938).
• 27-3: sub second, shock resist. (1940 - 1942).
• 27-23: sweep second, shock resist. (1940 - 1942).
• 27-53: chronograph 60 s Mediostat, shock resist. (1940 - 1942).
• 27-63: sub second, date hand, shock resist. (1944 - 1945).
• 27-7: sub second, super shock resist. (1948).
• 27-T: sub second. (1950 - 1952).
• 27-1T: sub second, incabloc. (1950 - 1952).
• 27-2T: sweep second. (1950 - 1952).
• 27-21T: sweep second, incabloc. (1950 - 1952).
• 27-61T: sub second, date hand, incabloc. (1950 - 1952).
• 27B: sub second. (1950 - 1961).
• 27B-1: sub second, incabloc. (1950 - 1961).
• 27B-2: sweep second. (1950 - 1961).
• 27B-21: sweep second, incabloc. (1950 - 1961).
• 27B-61: sweep second, date hand, incabloc. (1950 - 1961).
• 27B-621: sweep second, date, incabloc. (1950 - 1961).
• 27B-9: no second, incabloc. (1950 - 1961).