Yes. Used to catch the B82, B87, or B88 buses into Brum from there. The drivers had to do some sort of clocking in there.
You are correct , drivers or the conductor did have to clock just there by the Grove.
It was a large Green cast iron thing with a large clock face at the top and half way down there was a key hole ,each crew had a key with a number on and when the bus was leaving the Grove stop they had to put the key in and turn it,inside was an ink pad of some sort and this would put the key number on a paper roll inside so it recorded what time they had left the Grove.
I lived just around the corner in Halberton Street when I was about 6 or so and would wait by the clock hoping that the driver would put the key on the back of my hand once they had clocked so the number was on my hand,I would also ask them for the ends of the ticket rolls so I had tickets to play my own game of buses.
If you remember the clock perhaps you can help me with the shops that were by the Grove,I think that there was a sweet shop ,chippy (or perhaps the chippy sold sweets)and then a bike shop which was on the corner,from an earlier post I think the bike shop was Major Nichols ??
Cheers