Standard Slide Rules

Unique

Unique Brighton

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The 10 inch Brighton. The slide has been removed to improve the scan.
S and T scales are along the lower edge and there is a bevelled rule along the top edge marked in cm.
This picture is slightly distorted due to the scan. The lower picture shows the formulas on the back of the slide rule.
The back of the slide has the LL1, LL2 and LL3 scales. I guess the date of this model to be about 1965-70 because
the price stamped inside the box is 25 shillings (£1.25 in our current money.
I have no idea how many Euros that might be and I don't care either - perhaps the Monetary slide rule might help?

brighton front

 

brighton back