Just bought some old Slingerland drums with a snare, bass and tom. Date on the snare is February 23, 1960 and they are marked P-040. The blue sparkle wrap, rims, lugs, baring edges and re-rings, are all in very good shape for the age. The snare looks like a ply of mahogany on the inside and the tom looks like the inside ply is maple. Only issue is, the snare drum has several cracks on the inside ply. The tom does too but not as bad. Other than the cracks on the inside ply, the drums seem very solid and look great.
Because the drums are in such good condition otherwise, I want to fix the cracks. I have attached some pictures of the cracks in the snare shell. From what I can tell, only the inside layer is affected and it has separated from the layer behind it in a few places. Any advice on how to deal with this in the most practical way would be appreciated.
Thanks in advance for any info you may have.