Hammond Organ

It appears that you have what was the 2nd largest organ Hammond made, a' Hammond Concorde (or Monarch, I've heard mine called both)  I have one, as well as an Elegante, the largest Hammond ever made. 

I love my Concorde and think it has a better sound quality than even the larger Elegante.  Getting a value is tough, I found, as there isn't much comparable out there.  Yours is the first Concorde I've seen available - although I have seen several Elegantes listed, going from anywhere between $1500 - $5000, an enormous span.  The original price I believe was around $10,000.