3 Vintage Metric Converters - Pickett 114C - Instant 1971 Slide Chart - Fraction

Description

Here are 3 vintage metric converters from the 1960's & 1970's:
Decimal & Metric Equivalent of Fractions -- You can count on Henry Lavin Associates, Inc., Meriden, CT & Needham, MA -- copyright 1961.
It measures 5 1/4" x  3 5/16".
Pickett No. 114C U.S.A. metric Pocket Metric Converter -- plastic circular rule -- 10 separate conversions -- an owner name is etched into the clear plastic on the back.
It is about 3 7/8" in diameter
INSTANT U.S. to Metric Conversions -- copyright 1971 Slide Chart Corp., West Chester, PA. -- it's slightly warped, but slides freely.
It is about 8" x 3 3/8"
Condition is as pictured.
I am always happy to combine shipping.