Trying to ID a 2” barreled 6 shot S&W 38. I think it is a model 10 but want to make sure. Crane has a 6 above 8237 with what appears to be a 2 under that. Serial number in the 300,000 range. I googled a bunch but found nothing definitive. Want to make sure of the model for holster and want to ID the age to see if +p loads are ok. Thanks.