Norton & Gregory Time Slide Rule

Country of manufacture: England,            Date of manufacture: ____
Overall length: 66.0 cm,          Width: 5.2 cm,           Weight: 500.0 gms
Materials: Closed form simplex design; two slides; PVC stators and slides
Cursor: 5.1 X 5.9 X 0.8 cm; Brass runners holding plastic lens; lines = One
Scales: 4, specialized
Front: Unit Hour [ Hours on Bonus ] [ Base Rate Per Hour ] Bonus
Well and Back: Blank
Gauge Marks: [      ]
Condition: C4 (Signs of Minimal Use)
Came with: Original fitted wooden box