| Catalog number | 1945 | 1951 | 1954 | 1957 | 1963 | 1972 | 1975 | 1982 | 1988 |
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23-510
Bench model with 1/2 HP, 208-220/440-volt three-phase 50/60-cycle motor.
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23-515
Bench model with 1/2 HP, 115-volt DC motor.
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23-516
Bench model with 1/2 HP, 230-volt DC motor.
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23-560
Pedestal and 1/2 HP, 208-220/440-volt three-phase motor.
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23-565
Pedestal and 1/2 HP, 115-volt DC motor.
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23-566
Pedestal and 1/2 HP, 230-volt DC motor.
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23-555
Pedestal and 1/2 HP, 115/230-volt single-phase motor.
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