This was a standard chambering for the Frontier model, as well as the Deputy. Frontiers in the caliber are reasonably common, with production numbers estimated third behind .22 cal and .45 Colt. The Derringer was also offered in this caliber.
Rollmark: .38 SPECIAL
Models / barrels: All models were made in .38 except the Sheriff. No Sheriff’s have been observed in .38. It’s unlikely but not out of the question that a Sheriff in .38 will be encountered.
Build / Construction: Note the following that is particular to the .38:
Many Great Western .38 revolvers will chamber .357 Magnum.