Proofmeter Assy., Years: 06/01/1979-10/31/1985

Used in models:340, 445, 550, 540A, 445A, 555, 655A, 340A, 535, 420, 340B, 555B, 545A, 450, 540B, 335, 555A, 4610SU, 532, 515, 2600R, 531, 3600, 7600C, 5610, 6600, 334, 4600SU, 6600C, 4600O, 2910, 3910, 4110, 7610O, 3610, 2610, 6410, 231, 3600R, 530A, 5900, 333, 3900, 6610O, 3600N, 230A, 2600V, 5600, 4610N, 3600NO, 2310, 5110, 234, 6600O, 233, 4610NO, 6810, 4600NO, 2600N, 3600V, 2810