• 455 Martinson, Los Angeles
  • 8 (043) 567 - 89 - 30
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  • Ruxton Multi-Vider drop-lead pencil & slide rule
  • Rare Otis King Model K - white scales on black background
  • Pocket Hexadecimal Slide Adder for Computer Programmers
  • Post 1824 Dring & Fage Alcohol Gauging Rule
  • Darnley’s Rotable Lightning Calculator/Pencil Case
  • Lawrence Antenna (classified by UK & US during WWII) for Radar Beam Pattern Detection
  • Makeba Kombinator pencil & slide rule
  • Rare Carbic-made Fischer Calculator
  • For Calculating Strength of Liquids in Twaddells !!
  • PTT rule for Cable Radio (Signal Loss/dB)
  • Smallest drum (≈ 2.4m) made by LOGA

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You searched for: Ausschuss fuer Wirtschaftliche Fertigung (AWF)
ModelTypeMaterialCommentsThumbnail
SR 701 Machining Time poly-slide (2) - early cardboard/plastic

made by Hans Seehase to design (1928-1930) by Friedrich Bahlecke - table of factors on back

AWF SR 701
SR 702 Belt Performance & Belt Speed poly-slide (2) cardboard/plastic

made by Hans Seehase to design (1928-1930) by Friedrich Bahlecke

AWF SR 702 Belt Performance & Belt Speed
SR 704 Load Capacity of Springs cardboard/plastic

made by Hans Seehase to design (1930) by Friedrich Bahlecke - often used in combination with its SR 705 sibling

AWF SR 704 Load Capacity of Springs
SR 710 Bowing/Bending of Beams (metal or wood) poly-slide (2) cardboard/plastic

made by Hans Seehase to design (1931) by Friedrich Bahlecke - bottom scale = pictograms + Moment of Inertia table of constants on back

AWF SR 710 Bowing/Bending of Beams
SR 715 Rivets for Steel Construction cardboard/plastic

made by Hans Seehase to design (1931) by Friedrich Bahlecke & R. Jacki

AWF SR 715 Rivets for Steel Construction
SR 722 Water Line Capacity cardboard/plastic

made by Hans Seehase to design (1934) by Helmut Lummert & Friedrich Bahlecke - according to Lummert formula

AWF SR 722 Water Line Capacity
SR 726 Gas Pipe Line Calculator for High & Low Pressure poly-slide (2) cardboard/plastic

made by Hans Seehase to design (1936) by Helmut Lummert - SG & Conversion tables on back

AWF SR 726
SR 751 Blank but with hand-drawn scales for Machining cardboard/plastic

made by Hans Seehase - now part of the impressive AWF collection of fellow collector Karl Kleine

AWF SR 751