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Pittsburgh Test 3000Kg Dial
Proving Ring:

This ring is used for Brinell testers. Only when 10k cell is to big.
This ring is self certified by us. This Ring is almost 100 years old.
Pittsburgh Instrument & Machine Co.
Ring #180
 The calibration has not changed in that time. Checked from time to time. 

   500Kg 12.9 Deflection
1,000Kg 25.3
1,500Kg 37.9
2,000Kg 50.3
3,000Kg 74.2

Table stamped in case Ring #180

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