1 Circular object made of 3 plastic discs and joined together with a metal fastener in the centre. It has 2 different scales around the outside and has written on it "For Air Speed Correctness" and "For Altitude Correctness". There are 2 curved holes in this disc so that numbers are visible from underneath. It has a scale of numbers around the edge representing miles as well as some conversion equations. The third disc, the same size as the second, is translucent in colour and has a scale of red numbers running around its outer edge. Visible beneath it is the underside of the second disc which has a number of curvilinear lines labelled with numbers in degrees. The smallest disc rotates as does a rectangular strip slightly larger than the radius of the larger circles. It is of transparent plastic. -2 Black leather envelope with 2 pockets on the inside. It is square with a triangular flap that closes with a snap.
-3 Square book with a green cover. It has 32 pages. Title: Frewin Navigational Computer: Instructions for Use. By K.M. Frewin, A.R.AeS. Published by W. & G. Record Processing Co. Pty. Ltd., Melbourne, Australia.F39
Frewin / Navigational / Computer / Manufactured by / Melbourne >W&G< Australia Embossed
W and G Record Processing Company Limited. Navigational computer, case and instructions, 2004.409. The Museum of Transport and Technology (MOTAT).