Details and Image
|Date||Scale Length||Area of Use
|Linear||no model number||Pickett & Eckel||USA||Magnesium||© 1945||25 cm||Unknown
Notes: "Pickett & Eckel ""Deci.Point"" slide rule. The front of this rule has double-expanded and triple-expanded C-type scales; the back seems focused on decimal points; but: I do not understand how this rule is supposed to be used.."