A rare Plessey frequency divider chip in a metal can package. The device will divide an input frequency between 15 MHz and 150 MHz by four. The inputs can be capacitively coupled from an analogue signal or driven directly from ECL and the outputs are compatible with TTL and CMOS.
I am listing quote a few old and obsolete electronic components and am always happy to combine postage on UK orders.
Photos are of the actual unit on sale.