Can't believe I got these neat poker dice on eBay for just $14 w/ free shipping. A friend recommended the auction to me. It wasn't till after the auction that I started wondering what the E flag (burgee) was for. I searched Google images for SS Constitution and flags and burgees for the same, and came up with nothing. I was about to give up when I noticed that the ship was owned by American Export Lines, so I researched that and Bingo! "In 1931, they placed in service four cargo-passenger liners, Excalibur, Excambion, Exeter and Exochorda, known as the "Four Aces". The crowning achievement in American Export's passenger services were their largest and best-known liners, the SS Constitution and SS Independence."

auction:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=310389576255

The dice:

American Export Lines flag:

Robert