I have a '37 WFL 8x12 and a '38 L&L 9X13 both with tacked on bottom heads with steel rims on top probably the heads are all original. The heads are pretty thick. I bought from Re " someone " a calf skin batter and a snare side slunk for my '40 WFL snare. The batter head was very thin. I babied it, got into a whole temperature control trip and the dumb thing broke anyway. Does anyone make a playable calf skin head or is all just high-priced sit on the shelf collector froo=froo ?