The Rolex Air King (Past and present)

[Byron]

Recently, my uncle brought this out from his memory box and I was wondering if anybody had any more information about it. He has had it in his possession since the late 60's early 70's. Before that, it belonged to my great grandparents.

5500 is engraved between the lugs and a serial number that begins with a 369XXX is engraved between the other side of the lugs. I'm not sure if this is a Explorer or Air King.. Tested out the lume and it still worked a bit. I couldn't quite capture it. All I had with me was my iPhone 4s.

Any info is appreciated.

Thanks!
Byron