After countless attempts with other means to opens recalcitrant watch cases, I tried rodico, and "TaDa" if they can be opened, they will! (btw I know this case is a hinged case, I took the picture in "haste" just to show how easy it is to "get a grip" on "screw together" cases)

It's always good to see new uses for Rodico. I have a chunk of this on my bench all the time.Great stuff.

Hi David and Lawrence, Please excuse my ignorance, but what is Rodico and where does one procure it?
It sounds as if it may be handy to have around.

Timesavers has it at www.timesavers.com
their stock number is 14330
Also thay will send you a catalog with lots of goodies you can get to fiddle with, fix(??!?), and service horological items