I am new to the site so bare with me please in getting everything correct. I just inherited the attached revolvers and would like to see if anyone can help to identify them. I have been online trying to but have run into dead end. I am attaching pic of each so maybe that can help. I need mainsprings for both, showing them in pic. Would help if you could tell me where I might find them. I don't intend to fire them but would like to have them working mechanically. Revolver 2 - the cylinder is off timing by 1/2 hole, can this be repaired? Revolver 1 Top of barrel has - Wm Bishop 170 New Bond St London Right side above trigger has - Adams Patent No. 31833 (? guessed) 5 shot Caliber ? Revolver 2 Top of barrel has - no. 450 Right side above trigger has - 1654 Tranter Patent Left side above trigger has - N80Z 6 shot Caliber ? Thank you for any help.