The PUW caliber 1561 was a very familiar german selfwinding movement of a good quality. It was launched in 1971 and superseded by the caliber 1661 in 1975.
Typical for the PUW 1561 is its very healthy rotor winding sound, for which the click spring at “9” is responsible. With its help and with the tiny gear at “6:30” the rotor winds in both directions. The decoupling works with another tiny and freely working gear at “6”.
The whole selfwinding mechanism is very sophisticated and complex, but marks the climax of german watchmaking at the early 1970ies.
A tiny detail: The escapement wheel is beared with a very unusual type of cap jewel, since it is not a round one but almost shaped as a block. I’m not sure, what advantages besides probably slightly lower costs this has got.
The rest of the movement is the same, as on the caliber 561, inculding the very complex constructed date correction mechanism. It works by turning the time back and forth, but advances only when the crown is pressed afterwards.
|Number of jewels:||21|
Nickel anular balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Hairspring key|
|Winding mechanism:||yoke winding system|
|Functions:||hour, minute, second, day, selfwinding|
Flume: K3N1 -|