Offered for sale are six 163K1 Decoders for Kato N locos. 5 of these are identical, they have 2 holes in the circuit board and white LEDS. One does not have the holes and has Amber LEDS. These were removed from new DCC Kato locos purchased on Ebay. I have no way of testing them so if you buy one and it does not work I will issue a refund. $27ea includes shipping to USA. I am happy to answer any questions you may have. I accept PayPal, check or MO. Personal checks will hold shipping until cleared. sdvvrr@yahoo.com
Based on the description, I think they are Digitrax DN163K1 boards. Possible that they are TCS boards as well. Would have to check. to confirm.
yes, Digitrax DN163K1C https://www.digitrax.com/products/mobile-decoders/dn163k1c/ or DN163K1D https://www.digitrax.com/products/mobile-decoders/dn163k1d/