After what serial number does it become the A version thanks
- Re: pentax smc 15mm A KANGA
- Re: pentax smc 15mm A William Robb
- Re: pentax smc 15mm A Fred
- Friday: Cave joke Caveman
- Re: pentax smc 15mm A Fred
- Re: pentax smc 15mm A William Robb
- Re: pentax smc 15mm A Bruce Dayton
- Re: pentax smc 15mm A T Rittenhouse
- Re: pentax smc 15mm A Herb Chong
- Re: pentax smc 15mm A T Rittenhouse
- Re: pentax smc 15mm A Peter Alling
