My buddy just rang me after seeing thread about this carb.
It was offered as a replacement carb on various cars to replace the PIERBURG 2E3,(1800 sierra!!) and is fitted on anything from 2.5 landrover to 1.3 vauxhall/vw/bmw etc etc.
By all accounts it is a very good carb, as I say used in Weber's carb replacement kits, and there was me remembering a xr2!!
tabetha