Precision Optical Protractor Carl Zeiss (0884)

Index: 0884


Year: ?


Maker: Carl Zeiss, Jena, Germany


Dimensions: 18 x 4 x 8 cm (box)

Info

Optical Bevel Protractor for precise measuring of angles. The legs are set to the bevel after which the angle can be read by looking into the very small viewing hole. The scale reads from 0 to 90 to 0. Each degree has 6 subdivisions (5 lines) which would give the instrument a precision of 10 arcminutes.

The locking button reads "Los" (Loose) and "Fest" (Fixed).

The box is painted wood and also bears the logo of Carl Zeiss on the top lid.

Inscriptions:

CARL ZEISS
JENA

On the side of the fixed leg:

329 (Could be the type or the serial ?).

References/Links/More Info

Practical Machinist - Thread Optical protractor

Wikipedia - Carl Zeiss AG

Google Books - Handbook of Dimensional Measurement - Page 255

Images

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