Not sure what i bought

[Cumminspr513]

Im looking for a little help from anyone that can give a little info on whats sitting in my driveway. Ill tell you what i know and what has me stumped. I bought a 1972 Chevy C-10 4x4 Cheyenne. The truck is a regular cab, long bed and had a plow on it untill the other night. The door tags and inside glove box #'s match and are the same as ones on the title to the truck. The truck is a 6 lug wheel pattern. This is the part throwing me off...... it has cab lights. Not ones like you can buy at napa or any auto parts store, the roof has been stamped with raised landings for the lights(factory). What im looking for is well..... what is it that i have? and why havent i seen a c10 with cab lights before?