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Description | Blue 31013 Industrial Switcher |
Category | Variation |
Remarks |
This photo shows a blue version of the 31013 industrial switcher that was originally introduced in black. In 1960, a blue version was introduced bearing the 31021 number. Not only does this model bear the number associated with the black version, but also has the counterweight which is not a part of the blue 31021. Production 31013 - Production 31021 |