G/K43 20-round factory converted magazine 'aye'

A magnificent rarity, and surely a holy grail accessory for any collector of G/K43 related items!
 
One of just a handful of these factory-converted ex-MG13 magazines to provide 20-round capacity to the semi automatic G/K43. The known, identical examples which we are aware of include only two pieces in the USA and this one here in the UK. 
 
The conversion was carried out by Olympia Büromaschinenwerke AG, Erfurt, under the 'aye' code - who would also go on to make variants of the standard 10-round box magazine. 
 
This example remains in very nice original condition, with much of the factory finish remaining, and makes for a very imposing sight when fitted to a G/K43 rifle! 
 
*Please note that this item is only available to customers whose postal address is situated within the UK mainland. No international shipping.