Manufacturer: Aero Products Research
Country of Manufacture: U.S.A.
Type: APR CR-4
Number:  
Date of Manufacture:  
Scales: (Front) Many multi-functional scales for conversions, time, speed, distance, altitude, temperature, pressure, etc.
Scales: (Back) wind computation, true course and ground speed, true heading and air speed etc.
Number of Scales: 20+
Gauge Points: Large number of conversion factors
Slide Rule made from: Plastic
Cursor made from: Plastic
Cursor Lines: 2+
Overall Length of Rule: 11.0 cms diameter
Length of Scales:  
Width:  
Depth: 0.2 cms
Weight:  
Acquired from: "Briacc Sales"
Date: Jan 2003
Condition: Good
Accessories:
 Cardboard sheath. Good Condition.
 Instructions (English). Good condition.
Comments: