If it's Stainless and Double Action Only, it's a 4546, as there was no 4545 according to the SCSW.
If you have the box, paperwork, and anything else that came with it, depending on the condition, it could be worth up $1,000.00. That's according to, again, the SCSW.
These were only made for one year, although there are two versions. One has a square trigger guard, the other has a rounded trigger guard.
A picture or two would help the folks here give you more information.
Besides, we like pictures, especially of rare 3rd Gens.