v8stang289:
Your Model 29-3 .44 Magnum was manufactured in 1984.
Doc Peeler:
Your friend has a .38 Military & Police Model of 1905 4th Change manufactured in 1927 or 1928.
It has a heat treated cylinder, so should be safe to shoot with any standard pressure .38 special ammunition. S&W does not recommend use of PlusP ammunition in guns made before 1957.
It lacks the positive hammer block safety introduced during WWII after a fatality with a dropped gun. Treating it as a five shooter and leaving the chamber under the hammer empty would be prudent. It does have a hammer block, but in that once instance it failed. Note that is one documented failure for 1.7 million guns.
62124 is an assembly number, used to track parts in the factory, Model numbers were introduced in 1957.
S&W logo on the side plate is correct.
Grips usually had a gold S&W medallion, target grips may not and war time grips didn't. If you carefully remove the grips you may find a serial number on the inside of the grip. If matching then they are original.
Use this thread to check if it is mechanically safe to shoot:
http://www.thehighroad.org/showthread.php?t=695644
JJHACK:
The 629-4 .44 Magnum Stainless Mountain Gun was manufactured in 1993 & 1994.
40 guns were made in 1997. Your serial number probably dates to 1997, If the the front sight is a pinned black ramp, the grips timber and the finish bead blasted, then its a 1997 gun.
FCDeputy1911:
Your Model 37 Chiefs Special Airweight was manufactured in 1971 or 1972, with 1971 being most likely. Stick to standard pressure lead ammo only if you plan to shoot this a lot, there have been reports of timing/frame stretching when fire strictly with PlusP ammo. The frame is an aluminum alloy, the cylinder and barrel are steel.