My friend Al gave me this acrolite today. It had been in his storage for a long time. it looks pretty nasty but the shell is really in excellent condition. the serial number is 741369 keystone badge. According to the forum sreial number chart, this drum is one of the last keystone badges. the chart says keystone badges go through 741215. Also I've never seen one this color. it is a silver color. The rest of my acros are a greenish color or black tiny sparkle.
He also gave me a 13" blue/olive skyblue pearl tom that is in very ruff shape.