The caliber 1225 of Ebauches Bettlach is a highly unique constructed and tiny ladies’ watch movement. As usual with EB, it uses a pin lever escapement, but here, the anchor contains a little counter-weight (of which you can see the connection point down on 5 o’clock). The anchor wheel is beared in a cap jewel on the movement side.
A true speciality of that movement is the position of the balance cock: Instead of being located next to the top plate, it sits right on top of it and even contains a hole for the second wheel. Such a space-saving construction is hard to find anywhere else. And besides that, there’s another speciality: The three-leg ring balance is on top thinner as on it bottom side. Why that? No idea, sorry.
On the dial side, you see the yoke winding mechanism. Both hands are driven indirectly by the mainspring barrel wheel - a construction which originates by Roskopf watches and is often found on pin-lever movements.
|Number of jewels:||15|
Nickel anular balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||1 hole(s)|
|Size:||5 3/4 x 8 3/4'''|
Flume: 1952 38|