If it is a true 37"R" with a solid rib then it is more valuable than a plain 37. There were a bunch of these made and they go pretty cheap, but the R version makes it a little more valuable. Condition is everything--most older 37 were used pretty hard and don't have much bluing left and the stocks are beat up. They also made some later models with a factory vet rib--these have a solid forearm wood vs a ribbed/corncob forearm and are much more valuable. Great little guns--light to carry all day and very trustworthy.