Hm. can't say I've ever noticed a Pilot's Indicator actually installed in a Mossie, unless, perhaps it was done post war.
BTW, the pic in Post # 217 shows A.I. Mk.IV, so it's more likely that the aircraft is a Mosquito NF.II. The NFXII, as with the 'stop gap' NF.XII, used centimetric A.I. Mk.VIII.