I have an L3 automatic, grade 10CSC, 17 jewel. Non running, but in very nice appearing condition, movement, case, dial and hands. If I hold very slight counter clockwise pressure on the crown when in setting position, the watch can be forced to run. Is this typical? I have only recently gotten into wrist watches, but have been collecting pocket watches for some time. I know that a conventional wind watch can be forced to run by winding it fully and holding pressure on the crown.
Try taking a look at the mainspring. Pull the barrel and pop the top to see if the spring is broken about half way down. Sometimes that will present the problem and the slight pressure will engage the watch for short bursts. If you look in the pull downs at the catalogs and manuals you will find a manual on the repair of automatics.
John JP
The watch is in fully assembled condition, while I have some experience with the disassembly and repair of pocket watches, I have never.tried to work on an automatic wristwatch. Also, I have been browsing the vintage ads and watch pics, I suspect this watch is the Clipper model.
If you go to the information tab and click on it it will show catalogs, click on that and go to the automatic service manual and I think your movement will be there. The manual is very easy to follow and could give you some wrist watch training if you are up for it. I use it frequently to work on some of my automatics. I am the person who put it on the site and I know it to be a good tool.
John JP