6-inch advertising rulers, 2 with lenticular printing - vintage advertising

Six vintage 6-inch advertising rulers, including:

Electronic Enclosures Incorporated - Medium weight with inches and lenticular printing for fraction/decimal conversions. Small tearing on the back in one corner, and the former owner's name written on the back.

AMP Incorporated - Another lenticular printed ruler.  Medium weight with inches/tenths and fraction/decimal conversion. The back has some scuffs and pen marks.

Jarrell-Ash Company - Specialists in Optical Instruments. Lightweight white plastic, has inches and centimeters on one side and some handy conversions on the other side including Celsius and Fahrenheit.  Has black printing that is somewhat faded

vwr scientific - Lightweight white plastic, has inches and centimeters on one side and cork size top diameter ruler on the other along with some handy conversions. Has green printing, ruler is nice and clean.

A.S. Aloe Company - Laboratory supplies. Lightweight white plastic, has inches and centimeters on one side and some handy conversions on the other side including Celsius and Fahrenheit. This ruler has black printing and is nice and clean.

Adams - Lightweight off-white plastic with both inches and centimeters.  The back has black printing with the same information as the A.S. Aloe ruler. Some scuffs/marks.

These are vintage items. They have been used and loved and have a history. Please examine photos carefully and ask questions. We want you to love your find.