Artillery Formation/Unit Signs HELP

[Brad Mills]

OK,

Have been trying to contact Gunner but to no avail. Can someone shed some light on the markings for his Bofors.



Above are the markings on his Bofors.

I have opted to make mine part of the 3rd Canadian Infantry Division to go along with the NNSH, so, as Mikes is marked as the 3rd Div I tought it would be a cool idea to become gun #2 in that Troop.

Mikes Gun is marked as(correct me if I'm wrong):

4 LAA REGT
100 LAA BTY
H TP

???

My confusion on his markings...the Red over Blue square with 47 is pretty straight forward, then there is a small blue square above it with the small red square on the lower left hand side. Marked inside this is the following:
B 4
1

What do the above mean? B TP? Gun # 4 or Gun #1?

If someone can decode the markings for me and advise what my gun should be marked as if it was in that Troop!!!