Potters lead hardness tester

[abunaitoo]

I have an old Potters Lead Hardness Tester.
I have downloaded the instructions for it.
The scale they use doesn't tell what the Bh is.
This is it...........
The following table is a guide for using the Tester:
2-1/2 Scale Reading is approximately 10 to 1
4 Scale Reading is approximately 15 to 1
5 Scale Reading is approximately 18 to 1
6 Scale Reading is approximately 25 to 1
Anyone know what the Bh would be????

[ReloaderFred]

Send a PM to Roundnoser. He's the custodian of the Potter information and maybe he can help you.

Hope this helps.

Fred

[abunaitoo]

Thanks
I have sent him a PM.