I got this out of a 1957 Youngblood's Wholesale Catalog. I forgot I bought the catalog and just recently found it again. (A high res version was sent to Admin for data-basing)
Pretty cool looking at how much a wholesaler got the watch for and then what they charged the consumer!
Also a couple new ID's in here... the "Neptune", Bulova 23 "H", and the "Senator EW".
Very nice Plains, thanks for sharing.
In reply to Very nice Plains, thanks for by Bob Bruno
That's me Bob... I'm a sharer... I share. 
Thanks Plains...I'll add it tonight to the vintage ad section.
Nice find.
'NEPTUNE' is showing a Whale on the Dial.
Whale = certified Waterproof ?
I think We just saw this Watch as an 'UNKNOWN' - minus the Whale insignia.
here it is: http://www.mybulova.com/node/2879
The Neptune case looks a lot like what is often called the 'knotted lug' case. I don't think it was identified before.
There's another knotted case we have in the database... variant dial. The "Ashford".
The "Ashford" is dated to 1951 with a 2 tone dial , sub seconds register and gf case. I'd say the Neptune is a 1957 namechange as the case looks the same, though the dial and hands are different and this has sweep seconds. I don't think the Ashford is waterproof either.That would be enough differences to give it a new name.
never seen a watertite knot lug case before. Odd