Laboratory Differential Counter
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Unico L-BC9 Differential Counter, Metal Housing, 8-Key with Totalizer Window, Signal Bell, Dual Reset Knobs
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Unico L-BC6 Differential Counter, Metal Housing, 5-Key with Totalizer Window, Signal Bell, Dual Reset Knobs
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Unico L-BC3 Differential Counter, Featuring 2-Key and Reset Knob
