Vintage 1961 Fluke Precision Instruments Products Catalog

2 1977 BK Precision Test Instruments Catalog original

B & K Precision Dynascan Corporation Test Instruments Catalog BK-85.

Pomona Electronics 1987 Test Accessories Product Catalog

BK Precision Test Instruments

Vintage B&K Precision BK-7 Test Instruments Pocket Catalog 1976

1941 FEDERAL Precision Measuring Instruments, Providence, RI Catalog No. 41

Philips Catalog ~ Test and Measuring Instruments Catalogue 1974