Construction Master Pro Trig Plus III


Year of introduction 2000
Function Construction
Model Number 4070
Power 2 LR44 batteries
Original Price $99.95
Photo credit Mark Bollman

    With this model, the Trig Plus series moved to the Construction Master Pro line.  It's a calculator specialized for trigonometric calculations such as might be found in construction.  This one also has some preprogrammed metric conversions.  A recent update, model #4075, moves the reset switch to the left-hand side of the keyboard.

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