Dugena made some great chronographs along side some other lesser known brands using the valjoux movement, in the late 60's and 70's.
 
Here is an example in LNOS condition, with sharp case, and mint dial. The watch has its original hand tag.
 
The unsigned bracelet fits the watch well, made in 100% high grade stainless steel.
 
Overall this is an usual case style, with Dugena fully signed movement, and dial.
 
Check out those mini pushers, a really cool feature and styling.