circuit in a small 1 inch cube, usually 100 KHz, we have many variations available, most new, some use. Also used in TEAC, Dokorder, Pioneer, show picture of yours, maybe we have match, (many oscillators can be used if the "legs fit" they often will operate correctly, although you may require to reset the the record bias.) various numbers on cans are "C2210001", "22132530", "1810110", "NOB008", "13775202", "TEAC52922", "92132522", #8+ condition