A true Bankers Special is quite a collector with a premium price tag. The condition would determine it's true value.
The stocks for it should be the long D-frame stocks. They will be more difficult to find than the shorter newer D-frame stocks. Hunt the various auction sites and Gun Parts for them.
If that's really the serial number then there may be a problem. Unless I'm reading something wrong that serial number is too low for a Bankers Special. That number would put the frame in the 1912s to the 1916s range of the various PP and PPS and the Bankers Special was made from 1926 to 1940. I'm sure someone will correct me if I'm wrong, but someone may have rebarreled a PP or PPS with a Bankers Special barrel creating their own version. There have been fakes of certain revolvers over the years to take advantage of collectability.
The SPD No3 stamped on the butt is most likely some police department that used the revolvers. That would also point to the frame being a PP or PPS as most police departments would have used the Detective Special for their 2 inch revolvers.
Of course I could be totally wrong in all of this so don't get discouraged in just my post. We have on this site those with much more experience in the older colts than me.
[This message has been edited by Majic (edited 07-05-2005).]