Welcome to the forum Russell !
WOW ! 56 hours ! WOW !
NADA only lists the 1985 version, but the "Suggested List Price" for a new 1985 Hammond El Dorado V-1950 at $17,900.
That seems kind of high, as a late 70's Glastron V-195 went for $9500, and a CVX20 Jet went for $10,000.
You could check "Kelly Blue book" and see if number are the same ..
You might want to look at brochure for years.
Looks like button style interior was the 1979 models and 1978 was pleated vinyl.
http://www.classicglastron.com/hm-hammond-index.htmlYou got a 40 year old brand new boat !
I would use it ..