more about this VENUS movement in our replica (remember its not LEMANIA):
Original size can be found here: http://www.tjseagull.com/wkt/1901.jpg
The movement comes in 6 variants:
ST1901
2 register,
small seconds at 9,
30 min counter at 3
(Ex Venus 175 - parts compatible, Venus parts can be used for repair)
ST1902
3 register,
small seconds at 9,
30 min counter at 3
12 h register at 6 (non chrono!),
The 12h register's hand is directly geared to the main hour hand - bloody useless. See the pictures of the "Schaferwatches" 3-register chrono, the 12h in the register is always in the same position as the main hour hand.
ST1903
3 register,
small seconds at 9,
30 min counter at 3
24 h register at 6 (non chrono again),
The 24h indicator is directly synchronized with main hour hand, either used as 24h indicator or with the hand replaced by a day/night disk as a faux moon phase - day night indicator.
New variants 2007
ST1905
2 register,
small seconds at 9,
30 min counter at 3
decentral power reserve at 4:30
(Plazeon chronos)
ST1907
2 register,
small seconds at 9,
30 min counter at 3
central power reserve indicator
ST1908
4 register,
small seconds at 9,
30 min counter at 3
date at 12
day/night window at 6
No info about the "missing" denominations ST1904 and ST 1906.
Seagull is developing or considering:
A true 3-register chrono with a 12h chronograph counter at 6, prototypes have been built, this might be one of the missing denominations.
A GMT variant of the ST1903, where the 24h register can be set independently - only in consideration.
The addon of an automatic winding mechanism to this movement (allegedly prototype status).