I have questions on two different s&w revolvers but unsure how to start a thread. Maybe you can help....the first is a 6 shot on the on the butt end of it (bottom of grip) number is 4d72961 when I open the cylinder up I see mcd 10-7 and on the swing arm part of the cylinder it looks like 51723840 and then on the barrel one side reads 38 s&w special ctg. and the other side says smith & wesson. i can post a picture if you think that would help. the other one I have questions on is 38 s&w shows model 925 then has i assume a serial number of ar61124 and it is a 5 shot single action. any help you can give me would be great. Thanks

I know a little so I will start a reply...

When you swing open the cylinder you will see where S&W put their Model number and revision on more modern S&W revolvers (post 1950's I think? Someone will be along to correct that.)

In your first example, you have a Model 10-7, a "K" frame in 38 special. That is what that "38 special ctg" means, the "ctg" stands for "cartridge." That "4D" number is probably the serial number. The "-7" means that is the 7th version, indicating that there were prior engineering changes. There were a jillion Model 10's made, they are somewhat common and a terrific, well-made revolver.

S&W publishes a catalog that lists serial number ranges and associated manufacturing dates. Many folks here have it and will likely chime in with some additional information for you.

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Marty 4513TSW 13-1 642 60-10

Go back and look at this gun again. There is no .38 S&W Model 925 and S&W did not use a serial number like the one you mention.

If the 5 shot is a top brake it may be an H&R model 925.I have one in .38S&W.It will be marked H&R Inc.U.S.A. on the left frame under the cylinder,The s/n is on the right side.