Manufacturer: Dring and Fage
Country of Manufacture: England
Type: 4-Slide Proof Rule
Date of Manufacture:  
Scales: (Front) ?, ?, ?//A, [Proof] C, ? [C] D // ?, ?
Scales: (Back) SL [B] SS, A [B] MD
Number of Scales: 17
Gauge Points: Pins: On front 1MG at 187, MS at 47, MR at 532; On reverse MB at 222, 1MG at 278
Slide Rule made from: Boxwood
Cursor made from:  
Cursor Lines:  
Overall Length of Rule: 30.3 cm
Length of Scales: 30.3 cm
Width: 5.0 cm
Depth: 1.0 cm
Weight: 154 gms
Acquired from: Debs Wilding
Date: May 2002
Condition: Medium
 A, B, C, D not the modern scales