Spitfire elevator balance weight

[pirate_smee]

Hello, I want to know the weight of the elevator balance weight of a Spitfire.
I found the attached drawing with the position 27 cast balance weight, does anybody know the weight of these masses?
There should be two of these at an elevator.
Thx

 

[Wurger]

As memo the Spitfire horn balance weighed about 3.5 lbs. But it could have been increased often.