I recently acquired a large pile of vintage electronics from a semi-local repair shop that went out of business, and found this interesting item in the mix. The former owner appears to have purchased much of his inventory from government surplus auctions, so there was quite an eclectic selection of 1950s/60s military communications equipment in the lot. This particular item appears to be a North American Aviation "Panel Assembly- Launch Control Check Out" for the AGM-28 "Hound Dog" nuclear stand-off missile as used on Boeing B-52 Stratofortress bomber aircraft. The contract number on this unit does match up with AGM-28 production, as well as the B-52s AGM-28 payload being limited to the same two missiles indicated on this panel. If this is all true, I'd imagine it would have been installed on the B-52's lower deck "battle station".
Nonetheless, this item is a bit outside of my range of knowledge, so if anyone has any further info, feel free to add/correct as necessary.