Yes I remember that shop and the one on Hagley Road. This shop is still open (subject to current limits) but John retired a couple of years ago.
I also remember Birmingham Models in Summer Hill Road and Bearwood Models on Three Shires Oak Road & the signal out side. When George Evans retired, I think late 1970s Robert Chester-Lamb took over, the shops then closed and he moved to Malvern where he repaired clock and vintage trains, and my still do. Roger Carpenter, the railway photo man seen at many exhibitions, also worked there.
CCW Models/Hetheringtons lamps were in Avon Street.
Bunns of Birmingham, 'we buy sell & exchange SH model railways', where in an upstairs room next to the Birmingham Hippodrome. This later became Alan Bunn (who I think was the son) then West Country Kits.
And there was Chuffs, next door to the Bank of England with Peter Hunt. This became Perfect Miniatures with his wacky adverts in Gazette until his resent retirement.
Am I getting old? yes.
Regards
Allen Morgan