A.W. Faber 332 logaritmar logaritam siber 1930

Redak logaritam siber iz 1930 godine.

ummary System: Mannheim Specialization: School use Type: Closed frame Material: Pearwood Facings: Celluliod Scale Length: 12.5cm No of Scales: 4 Front Length: 142mm Front Width: 24mm Language: English Origin: Bavaria Date: 1930, October Features/Notes: Pocket rule Scales (colours as shown) Front: A [ B, C ] D Back: - Labels Left: - Labels Left: - Labels Right: - Labels Right: - Style: Normal Typeface: Serif Extensions: - Decimals: As units between 1 & 2 on C & D Gauge Marks: p (3.14) on A, B, C & D
C (1.13) on C
C1 (3.57) on C Rulers: - Features/Notes: - Construction Stock: Single piece solid stock.
Braced with longitudinal metal strips (DRP 206428, 1908).
Square top and bottom edges.
High cursor grooves both cut parallel to front face.
Flat back.
Front celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 142 x 24 x 6.5 Slide: Single sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Celluliod faced on both sides, secured with wooden pins (DRGM 371190, 1908)
Front face width (mm) - 10.5 Cursor: Single piece moulded plastic.
Left end riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 24 x 27 Printing (colours as shown) Stock: "332" + scales logo + "A. W. FABER" in the centre of the well, sans-serif.
"MADE IN BAVARIA. " in the centre of back, sans serif. Slide: - Cursor: - Labels: None

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