1956 Chevy pickup vin #

Im getting ready to purchase a 1956 3200 Chevy pickup . The vin tag shows 3B560018164 . I entered this number in a " VIN Decoder" web site. It identifies it as a 1956 B-210 Model . It also states that the ***embly plant code ( 4th digit ) is invalid . Any thoughts would be greatly appreciated.
Thank you - JM

 

3B or 3200 series 122.3 wheel base (8 foot bed) 1/2 ton, the 56 year, O means Oakland Ca, 18,164 production number

 

Thank you. I was entering a " zero" in stead of an O .