I have the S&W letter confirming that this 4" revolver left the factory in 1980 in this configuration.
I am going to guess at the trade value and say $3500.
I have more pictures and can share with serious interested members.
I am more of a Colt collector, so this S&W is out of place in my gun safe.
Can PM me (may be slow in replying) or text me at 22five 20two 905one