Historical information
Item in the collection re Craig Triffett. Refer Cat No 5997.5 for his service details.
Physical description
1. This is a clear piece of flexible plastic. It has 180 degree arc markings on it. The reference line is at the bottom. Internal rings have numbers marked on them, i.e. 1,2,3,4,5. The outside ring has graduations in 1*. At the bottom are words "Observers Location - Grid", and "Altitude". Scale 1:50000 Army Form B 6716 (1971).
2. Similar to above, but slightly cropped. No explanatory notes.
