Help identify old Bear longbow

[KentuckyTJ]

Have a guy wanting to know any info he can on this old Bear. It is a wall hanger I am afraid. Vertical split that goes all the way through up at the string groove.

[Blackhawk]

1953 Polar...  

[zepnut]

Maybe a 1955 with the way the riser looks.

[Drywood]

I have got interested in Bear serial numbers.For the last year I wrote down all the Grizzly,Kodiak , Cub Polar seen in flea bay.I am thinking MA320 is a 1955 polar.Also someone older than me(68) told me that 1955's have the black ring of paint above the grip.
If you understand the bear system I'd like to hear from you..thanks

[Blackhawk]

All of us would love for someone to unravel the Bear serial # mystery.