Pickett & Eckel Model 500-T
Ortho-Phase Log Log
(1957 ?)
slide rule
slide rule
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ManufacturerPickett & Eckel
Model500-T
Serial No.
Scale length25 cm
Overall length30.8 cm
Width3.8 cm
Body/Slide materialsAluminum, 2.5 mm
Post materialsStamped aluminum
Cursor materialsMachined aluminum (extended) / Plastic (plain, flat)
ScalesLL0 LL00 A [B ST {T S} C] D K
L LL1 DF [CF CIF CI C] D LL3 LL2
AccessoriesBrown plastic case, good condition.
NotesGrooved slide. Outside of rails still grooved for cursor.
Introduction of range values on LLn scale labels.
Tag No.PE-500-20
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