[JRSully]

first thing you check is the stamping date, all the 837's were batch made and have specific dates (unfortunately these dates are getting pretty well known).Jeff Dotterer at Dated Components and John Pirkle are well known authorities. Usually the isssue is with the "7" in 837 it has a distinct look to it (usually not very clean). If you look at that "837" on Ebay and look at all the different 7's, you will see they are not the same. The Restampers are getting better everyday, hope this helps