I recently acquired a 55M and now I'm setting to work on it. The stock has some dents / handling marks and will be refinished by me with Napier's London Oil. I will strip the gun and examine the internals but the rifle cocks and shoots very smoothly as it is now. Breech seal looks good but it's coming out. I'm expecting that it and the piston seal will be OK as is but may need some TLC there. Then I'm going to completely disassemble everything on it and have the metal work re-blued. Will take photos all along the way. Will be a spectacular airgun. Many thanks to Scott Blaire for his guidance to date. Teaser photo below :