I was hunting around my basement today and found a stash (literally a stash. I completely forgot about this.) of Gargraves 3 rail track. What I would like to know is how do I know if this is stainless steel or tinplate track? I see they make both. I think I purchased it about 15 or 20 years ago. The only marking I found on the track is on the underside of one of the ties. Looks like it's painted silver.
Thanks in advance, Rick