In 1941 Revue started work on a new movement design to phase out their robust calibre: 59. in 1945 they released their all new calibre 77. This new movement was 1mm slimmer than the older calibre 59 and had nicer finishing. The movement stayed in production into the mid 1960’s with improvements made to balance. Calibre 76 is close to identical, but has a smaller diameter same goes for ladies movement calibre 78.
77
77 CLD (sub seconds with date)
77 SC (sweep seconds)
Suffix 0.1 with adjustable stud carrier.
GT stands for Gédéon Thommen
Revue calibre 77:
- Made from a prox 1948-1965
- Made in Switzerland
- Power reserve around: 40h
- 15-17 Jewels
- 18000 B/A
- Lift angle 52°
- DM: 25.60mm (23.3mm cal 76)
- H: 3.3mm
Gear-train bridge has an elaborate designed to mimic a single escape wheel cock, even though it’s a single unit (note it used 4 screws to complete the look). The bridge surfaces have a very fine finish with polished beveled edges. Movement has Rhodium plating and guilt infilled lettering. Very impressive ratchet and crown wheel; both with highly polished bevled edges, starburst shoulder and polished centres.
Top surface finish on bridges: 8 Points
Surface finish on screws: 8 Points
Surface finish on ratchet and ratchet wheel: 9 Points
Movement Jeweling: 6 Points
Movement design innovation (1945): 7 points
The Revue base plate has a very fine finish on both dial and gear train side with pelage decoration under gear train and on the dial side. Setting mechanism feels balanced and is well made.
Base plate finish: 7 Points
Setting and winding mechanism: 7 Points
Gear-train finish: 8 Points
Date change snappiness 10.30-12.00: 5 Points*
Movement durability: 7 Points
Date mechanism adds hight to movement and the covering plate finish is crude compared to the rest of the otherwise fine movement finish.
Sweep second variant, has a nice cock that is jewelled for the sweep seconds pinion and has a nicely made tention spring.
Some early watches have no shock protection, but it soon became standard. Later watches with a suffix .1 adjustable stud carrier.
+ 3 points for shock protection.
+3 points mobile stud carrier.
The Revue calibre 77 is a decent timekeeper.
Accuracy: 7-8 points
Power reserve of 40 hours is decent
Power reserve: 7 Points
Revue calibre GT 77 series points summary:
Surface finish on bridges and top side of base plate: 8
Surface finish screws: 8
Surface finish on ratchet and ratchet wheel: 9
Movement Jeweling: 6
Movement innovative design for ca 1945: 7
Base plate finish: 7
Setting and winding mechanism: 7
Date change snappiness: 5
Gear-train finish: 8
Movement durability: 7
Total bonus points: 6*
Accuracy: 7-8
Power reserve: 7
Grand total: 81-93
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