$200 + in that condition easy. I'll try and pull out "The Duck Calls of Minnesota" this weekend and be able to tell you the model number. 1930's-1940's.
Here's a goose call from the same period of time:
Note the funky "Herter's" V bend in the old metal reed. Note also that the insert is machined to screw in to the barrel....took me forever to figure out how to take it apart.
There was one on ebay recently where the guy put one of those duck calls into a MUCH more recent goose call box and it sold for over $300. The collectors would not have been fooled. The pristine condition is extraordinary. I'll see if I can find the listing.
Found it.....see if this doesn't look like what you got: