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POST List 1463-1493

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POST POST Slide Rules POST


The Frederick Post Co., P. O. Box 803, Chicago, Illinois 60690
Question marks indicate uncertainty, blanks indicate a more significant level of ignorance.
Where a surface is known to be blank, 0 or blank is used.
Colors indicate country of origin. Blue = U.S.A., Red = Japan, Green = Germany, Black = unknown.

Post 1491 Chemical Rule

- Model Number - Type Length Material Front Back Dates Comment
Catalog Number and Name Names in italics actually appear on the rule.

Other names are common usage or taken from catalogs.

Post brand slide rules are usually labeled with model number and the Post trademark or Frederick Post Co.
Type: Mannheim
Duplex
Simplex
Circular
Etc.
Simplex means a duplex rule that has no calculating scales on the backs of the stators.
Nominal Length in Inches (Most 10-inch slide rules have scales that are actually 250 mm long--slightly shorter than 10 inches.) What the rule is made of, such as wood, plastic, unobtanium, etc. Scales on Front For mannheim rules only, this also includes any measuring scale on top edge set off with // or ||. 'cm //' indicates a centimeter scale on a slanted surface; '0 ||' indicates a vertical surface with no scale. Scales on Back For mannheim rules only, this also includes any measuring scale on bottom edge set off with // or ||. Measuring scales are given wherever they are known. If nothing is shown, scale is not known. Our guess about when the rule was made or available. If we have only one reference, that date is given. Other interesting information such as original catalog price, what rule it was made from, or is similar to, etc.
1463
Ritow Students' Manifold
Mannheim 10 Bare Boxwood S1, S2, D1, D2, D3 [C1, C2, C3, ?] D, R1, R2   1925 - 31 Scales uncertain. Celluloid indicator. Claims single, double and triple-length scales.
1463
Post Midget Circular (No brand on rule, Post 1463 on instructions.)
Circular 4 Metal C, CI, L, A, A, LL3, LL3, Fractions, Drill bits, etc. Degrees, Sines Tangents three each 1936 - 49 exc WW II Gilson Midget (2nd A scale marked in fractions.) $2.50 in 1949.
1464
Ritow Manifold
Mannheim 5 Celluloid Boxwood S1, S2, D1, D2, D3 [C1, C2, C3, ?] D, R1, R2   1925 - 31 Scales uncertain. Rimless indicator. $10.20 in 1927.
1464
Winslow Strength Computing Slide Rule
?   Non-metallic     1936  
1464
1464, Click for bigger Pic, browser BACK to return
Post Binary Circular (No brand on rule, Post on instructions.)
Circular 8.31 Metal C, CI, A, K, L, LL1, LL2, LL3, LL4 Q, S, T (3 times) 1949 Gilson Binary. $7.25 in 1949.
1465
Ritow Manifold
Mannheim 10 Celluloid Boxwood S1, S2, D1, D2, D3 [C1, C2, C3, ?] D, R1, R2 ? 1925 - 31 Scales uncertain. Rimless indicator. $11.40 in 1927.
1466
Ritow Manifold
Mannheim 20 Celluloid Boxwood S1, S2, D1, D2, D3 [C1, C2, C3, ?] D, R1, R2 ? 1925 - 31 Scales uncertain. Rimless indicator. $25.20 in 1927.
1468
Ritow Manifold Duplex
Mannheim 10 Celluloid Boxwood S1, S2, D1, D2, D3 [C1, C2, C3, ?] D, R1, R2 Fraction-adding scales. 1925 - 27 Scales uncertain. Rimless indicator.
1470
Ritow Manifold Simplex
Mannheim 10 Celluloid Boxwood S1, S2, D1, D2, D3 [C1, C2, C3, ?] D, R1, R2 Fraction-adding scales. 1925 - 27 Scales uncertain. Rimless indicator,
1471
Ritow Merchants' Log Log
? 10 ? 'Eightfold log log'   1925 - 27 Rimless indicator.
1472
Ritow Merchants' Log Log
? 20 ? 'Eightfold log log'   1925 - 27 Rimless indicator.
1473
Ritow Merchants' Log Log Simplex
Ritow 10 ? 'Eightfold log log'   1925 - 27 'Simplex construction, simplex indicator.'
1474
Ritow Merchants' Log Log Simplex
Ritow 20 ? 'Eightfold log log'   1925 - 27 'Simplex construction, simplex indicator.'
1475
Ritow Cylindrical
Cylindrical 3 dia X 12   '500-inch helical scale' NA 1925 - 1930 Similar to Fuller
1490
1490, Click for bigger Pic, browser BACK to return
Post Frequency Response / Control Engineering
Mannheim 10 Celluloid Bamboo 10 in // t, w [CI, f, P, C] D, A, db [Q, Qd, g', g] || 27 cm 1957 Hemmi 301. Four cursors!
1491
1491, Click for bigger Pic, browser BACK to return
1491, Click for bigger Pic, browser BACK to return Post Chem-Rule
Duplex 10 Celluloid Bamboo L, A, DF [CF, CIF, CI, C] D, LL3, LL2, LL1 Ch. A-M, N-Z, M1 [M2, oF, oC, oK, F(t)] Kg/cm2, mm Hg, In. Hg Vac., tw 1963 Hemmi 257.
1492
Boucher Calculator
      'Stem-winding watch'   1925 Enameled cardboard dial.
1492A
Boucher Calculator
      'Stem-winding watch'   1925 Silvered dial.
1493
Halden Calculex
  2.375 dia X 0.25   L, A, B, C, D Six scales 1925 'Sole leather case.'
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Click for the POST List 1450-1459
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POST List 1463-1493

POST List 1463-1493
Click for the Teledyne-POST List 1410-44GC
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