Eppler producted in the (estimated) 1960ies - 1980ies a number of simple(st) pin lever movement with 10 1⁄2 lignes diameter. Those movements were available in different flavors, with or without date, with or without second and different balance bearings.
Unfortunately, those movements are not marked at all, so that their identification is pretty difficult. The only things, that help here, are the Flume Werksucher and the fact, that Eppler owned the trademark for “Anker” watches and put that movement type into millions of “Anker” and “Anker 100” watches in the 1970ies and 80ies.
The construction of the caliber 17 is pretty simple: It contains a shock protected ring balance with pivots, which controls a ruby-less pin lever escapement. The whole gear system is below a single plate, which makes it very difficult to service (which is probably intended because of the cheap production). Quite unusual is the fact, that the cannon pinion and the minute wheel are made of plastic. How long they will last cannot be forecasted.
As usual on cheap movement, there’s a rocking bar winding mechanism below the dial, which at least uses a well made click spring system.
The balance cock is pretty weird: Two of the three screws fix it, but the third screw is used for correcting the height of the cock by simply bending it. And since that’s not enough oddity, the hairspring is just glued onto the porte-piton mobile and thus cannot be exchanged at all, but that’s probably intended by the manufacturer of this “disposable” movement, which powered millions of cheap(est) watches.
Nickel anular balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Hairspring key|
|Winding mechanism:||rocking bar winding system|
|Setting lever spring:||3 hole(s)|
Flume: K3 67|