Dale, your gun certainly looks like a bargain for $650. Your main area of concern is to make sure the barrels are in good condition to withstand the pressure of the shells you intend to shoot. Even shooting low pressure loads in poor barrels can be dangerous. I suggest you have Dewey inspect your barrels before shooting your gun.
I know Dewey does bone and charcoal case coloring but I'm not sure of cyanide coloring. His web site is:
http://www.vicknairrestorations.com/.
Dewey can also fix your stock if desired. We also have an excellent local stocker, his name is Craig Libhart. Craig lives in Bainbridge just south of 3 Mile Island, his web site is:
http://www.susquehannastockworks.com/.
My friends and I have talked about going to Martz's sometime so send me a PM with your e-mail address and we'll get together sometime.
Congratulations on your find!