slimpickens:
The Model 629-6 sounds like one of three special runs for RSR distributors in 2003, these were respectively:
Model 629-6 Trail Boss Unfluted, 3 inch barrel, red ramp, white outline, Hogue grip, satin stainless, internal lock, unfluted cylinder, smooth trigger, semi-target hammer, lanyard loop.
Model 629-6 Trail Boss Fluted, 3 inch magna-ported barrel, red ramp, white outline, Hogue grip, satin stainless, internal lock, fluted cylinder, smooth trigger, semi-target hammer, lanyard loop.
Model 629-6 Trail Boss Deluxe Anniversary, 3 inch Magna-ported barrel, red ramp, white outline, Altamont wood grips, bright polished stainless, internal lock, fluted cylinder, smooth trigger, semi-target hammer, aluminum case.
It may be a later build however, as the 2003 serial range was roughly CFSxxxx to CHDxxxx, although special runs tended to run out of serial number order.
The Model 624 Lew Horton Special was produced 1985-1987, with 5000 manufactured. Know serial ranges were AHTxxxx & ALWxxxx. My guess is 1986 year of manufacture for your gun, but possibly shipping 1987.