Great - thanks for the quick reply!
I meant to also post:
You do not need to waste time or money with a gunsmith.
Simply put, the only usual issue with these marvels of yesteryear is they are gummed up and dirty. Old oils of its time do not match the quality of these old guns nor the science of today, and actually dry up and harden to the point of impeding operation and accelerating wear. The simple solution does not need a gunsmith. Just one of any premium modern gun product from any sporting goods, gun store or hardware store.
Most are both cleaning and preserving agents; Breakfree, Kroil & M-Pro7 are some of the best, but there are others. Disassembly is not necessary. With grips removed and a spray can version of the product, flood and flush the revolver thru every opening and crevice until the black gunk stops flowing out, let it drain for an hour and wipe it down good.
Scrub barrel bore and cylinder chambers with a simple cleaning rod kit found at the same places as the cleaning agents above, and patches cut from rags is all you really need. And scrub any observed exterior and crevice crud with an old toothbrush with bristles cut off short for stiffness.
Once cleaned and lubricated, with a few simple checks you can determine if it’s safe to use. Open the cylinder and verify the barrel is unobstructed. Cock the hammer slowly and confirm the cylinder is locked in position for each of the 6 chambers. If satisfactory, now operate the gun by pulling the trigger slowly until the hammer drops. Again, confirm each time after cycling the action, that the cyl is still locked in position. Cock the hammer in single action mode. Gently push on the hammer to confirm that it will not drop w/o pulling the trigger.
If you do want to venture further to disassemble, although not needed, here are two videos using a gun almost like yours, a .38 Special Model 10, showing step by step disassembly and reassembly:
SMITH & WESSON MODEL 10 SERVICE REVOLVER PART 1 - YouTube
Note: The part referred to in the video as the crane is actually the yoke in S&W terminology. Crane is the Colt name for that part.
[ame=http://www.youtube.com/watch?v=KneMUM9rfw4]SMITH & WESSON MODEL 10 SERVICE REVOLVER PART 1 - YouTube[/ame]
SMITH & WESSON MODEL 10 PART 2 - YouTube
[ame=http://www.youtube.com/watch?v=2SyZpmw1K-A]SMITH & WESSON MODEL 10 PART 2 - YouTube[/ame]