What is the value of a prestwich fluid gauge?

Does any body know any general info on a gun with the following inscription Winchester 22 w c f pat oct 7 1879 5633? What is the value of a colt 44 calibre pump action pat 1883 Serial Nr 25307? How old is your sig sauer 226 serial number u515247? How many gun expert are in the world? What year was my gun made? Is k pacho expensive for a sweet 16? When was the mossberg 12ga c-lect-choke model 395kb bolt action shotgun with a wooden stock manufactured? What is the perimeter of the parralelogram 10mm 9mm 12mm? What is the value of a mosin nagant 91 30 in great condition? How powerful is a ak47 bullet? What is the value of a Winchester Model 94AE 30 30 with serial number 6312362? What is a 222 revelation model 225 rifle worth? What is the value of a charter arms 38 special undercover serial number 572885? Are butterfly knives legal to own in Illinois? What is the age and value of a Winchester Model 94 30 30 serial number 1697559 with original finish and parts in great shape. Used sparingly? What do the proof mark EKG in a circle mean on an old percussion cap pistol? What is the value of a begium made browning 3 inch magnum- standard grade with no poly-choke compensator or recoil pad serial number 6V 94583? How do you remove the locking bolt on a Stevens 87A? How many bullets are in a real Tommy gun? Is the bullet button a toggle that turns bullets off and on?