Ramtek Clean Sweep Kevin's board From Greg Fife Etched in copper SERIAL NO RAMTEK COPYRIGHT 1974 ASSY NO 501082 A MADE IN USA Handwritten 505296 Ethced in copper on back P/N 501083A 10.733 MHz crystal .6c MMI6331 read as 82s123 .d7 MMI6331 read as 82s123 stickered 501076 7D .k3 MMI6331 read as 82s123 stickered 501074 3K WinRomIdent v1.05 ============================ clean.6c:[BE02B5F5] Not Found! ** warning some unused bits [01111111] possible bad ROM. ============================ clean.d7:[BE40B153] Not Found! ============================ clean.k3:[515A34BA] Not Found! ** warning some unused bits [11111100] possible bad ROM.