Up until about 1968, the interiors were 3-ply/solid maple reinforcement ring with an interior ply of mahogany (painted white) and had the wraps tucked into the scarf joint of the shell, itself. After 1968, the interiors were 3-ply/solid maple reinforcement ring clear maple and the wraps were no longer tucked into the shell scarf joint.

oh awesome!!! thanks o-lugs!!

are you familiar with the differences in bearing edges? i've heard people saying

"this bearing edge profile makes it more likely to be 60's, and that bearing edge profile makes it more likely to be 70's,"

but didn't pick up on the actual difference

Sometimes, in the 70's, they started to cut bearing edges a little sharper...but it wasn't consistent and you see both rounded and sharper edges during this period.

I had a green sparkle 70's B/O badge Pioneer once and it had sharp bearing edges. At first, I thought someone recut the edges, but the shell had not been cut down. Later, I read lots of similar accounts of such edges, so I assume these discrepancies originated at the factory.

ohhhhh cool.

Do you (or anyone else for that matter) know where i could find a "blueprint" of the 60's bearing edge?

and i've also read in some places that the 60's hardwear had nickel in it? chrome over nickel or something?

does that sound right?

iirc earlier 60's had the NOB or COB hardware.

My '65 snare is NOB.

hey shawn, thanks!

is the 70's hardwear chrome over brass???

and do you know roughly what year ludwig went from nickel over brass to chrome over brass?

Location of the Badge is lower on the late 60's Keystone drums vs. the 70's B/O badges.

The wingnuts/eyebolts on early/mid 60's leg brackets are smaller diameter.

The lugs are further from the bearing edges by about a 1/2" on the 60's drums - on the floor toms, anyway: