1957 Pilot's Flight Computer Navigation Airplane Aviation Slide Rule KNP-57 E6B For Sale

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1957 Pilot's Flight Computer Navigation Airplane Aviation Slide Rule KNP-57 E6B:
$209.30

Hello, up for your consideration is a vintage Bulgarian production slide rule model KNP-57 copy of E6B in my opinion. This is pilot's flight navigation computer calculator featuring compass graduation rotating disk. I'm not a special and don't know much about it. All completed made of plastic. Rare collectible piece.

Condition: very good vintage.

Please, be sure to view all photos carefully as they are included as part of the item description.

Measures: 9.75 x 4.5''

Check my other sales for wonderful antiques and collectibles!

terms and conditions:

All my items are as described, all authentic and original collectable items. They are described the best way I can. All questions will be answered on time depending on the time-zone differences.

I ship only registered airmail worldwide with tracking number provided.

Package will be securely wrapped to prevent any damage. If needed in double box.

100% refund guaranteed. Do not worry to contact me if you need assistance in any situation. Will do my best to satisfy my customers. Will combine shipping for multiple purchases.