Hey guys, just sorting through the MASSIVE pile of FDCs I am listing on
ebay and found something I thought was really cool, first time I see this one. I'm a huge military history buff so thought this was pretty awesome. It's a 1976 FDC from the 410 Squadron Cougars for 25 Years Active Service, RCAF and Canadian Forces with a Scott# 692 RMC Centenary stamp.
The part I loved is that the actual FDC itself was on an actual supersonic training mission with 410 at a mission height in excess of 50,000 feet and the card is hand-signed with the top speed achieved during the flight (Mach 1.2) and it is signed by the flight pilot Capt. R.W. Walker and flight navigator Capt D. Bouchard.

I love rooting through boxes of random stuff, never know what cool things you'll dig up.
Dan