Most of these drums have 10 brass wood screws or 10 brass brads on the top bearing edge that are in line with the tube lugs and are there to allow the brass ring of the Tone Flange to seat. This drum is a tad different, there are12 brass brads that do not line up with the lugs (see photo). I also noticed a difference in the internal attachment hardware. On Slingerland snares of this era there is usually a washer, a lock washer and a screw. This drum has a larger washer, smaller washer, lock washer and a screw for the lugs, 3 point strainer and butt plate.