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NASA 136MC Ambiguity Resolver circular slide rule 12-inch

1965-1970

Circular No.101C dial slide rule with sythetic leather case and instructions

1965-70

Circular slide rule by Pickett, metal and plastic, in leather pouch with instruction booklet

Circular slide rule by Pickett

Pickett slide rule, model N-16-ES, with electronics scales designed by Chan Street, Los Angeles, in leather carry case

Pickett slide rule