Vintage Hansen Serial Help

Looking for the history of an older Hansen, serial 4250B. The board came through my shop for a few small dings and I was curious if anyone could give me any history. The board is owned by an older gentleman who replaced his original board from when he was younger (another Hansen) with this one after his was stolen.

Any help is appreciated! Thank you 

I’m guessing 1964-1965 and shaper is Duane Brown? 

Very very late 1965, or very early 1966.        And yes, the board was shaped by Duane Brown.

Thank you! I’ve been lucky enough to have a few older boards come through the shop, including a Gordie Noserider and G&S Hotcurl, all in very good condition. Such a cool feeling when going over these 50+ year old boards. Old souls