Help I.D. Myt Colt Mk IV / Series 70....

[xXxplosive]

Have a Colt Mk IV / Series 70 Gov't Model I purchased some years ago....tried to look up the Serial No. but can seem to find any prefix letter "A" or B for that matter.....very unusual.....any help appreciated.

Serial No. A 70B3XXXX

Thanks

 

[Dr.Rob]

1983 production

 

[xXxplosive]

Thanks.............