This was taken from the 27th Edition of the Gun Traders Guide:
Win Model 37A Single Shot Shotgun
Similar to the Model 370 (Made from 1968-73) except has engraved receiver and gold trigger, checkered pistol grip stock, fluted forearm: 16 ga. available with 30" bbl only. Made 1973-80.
Model 37A 12, 16, or 20 ga. Nib $161 Ex $129 Gd $88
W/32-inch bbl., add $20
Hope this helps
EVOC ONE