Barr & Stroud course setting bomb sight MK IXA
 

A friend of mine has got this model of gun sight. In the site of the Glenn's computer museum I've read that it was employed by Stirling, Lancaster, Wellington, Beaufighter, Beaufort and Mosquitos. Does anyone could confirm such an extensive use of this device? When was it superseded by other models like the MK XIV?
Thank you

Gianandrea