Phil
The date of the survey of the map doesn't necessarily have a lot of bearing on the date it was used. The Inland revenue maps (1:500) used for valuation purposes that are at the national archives are all (for Brum) those surveyed in c 1889, though the valuation was done around 1918. Sometimes some changes were added. but these were not always complete. The edition of this map would seem to be the 1917 version (with some levelling changes for heights slightly 1921r. This version is the same as that used by Alan Godfrey in his map Birmingham north "dated " 1913, though alan's seems tp have been taken from the coloured edition, where some buildings appear shaded, whereas this seems to be from the b;ack & white wersion, where they are in white, with just outlines. This map would probably have been the one available fro at least 10 years , possibly even 20 years, though i have no data on that. So it probably could have been made with the pub additions any time after 1921 till WW2.
mike