Logarithmeum
Slide Rules
Log Tables
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Aristo
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Rietz
Aristo Rietz
Models in this series:
Slide Rule ID
Model
Lot Code
Model 99
#207
99
2LR03
#268
99
492
#335
99
522
Model 89
#18
89
GFL4
#100
89
3LI4
#297
89
G6218
#351
89
G5925
#380
89
G5814
Model 109
#473
109
432