Hello,
Z8772, was definitely not a Wellington DWI/II.
Known Data on Vickers Wellington Types 418 and 419 (DWIs & DWIIs):
Mark IA
Vickers Type: 418.
Description: DWI Mark I - Engine/Generator, Ford V8
Engines: Pegasus XVII
Conversions - 4 from Mk IA.
Initial conversions from Mk IAs were: P2518, P2521, P2522 and P9223.
Mks -Various.
Vickers Type: 419.
Description: DWI Mk.II - Engine/Generator - DH Gipsy VI
Engines: Pegasus XVII
Conversions - 4 from Type 418, 11 conversions from Mk I, 1 conversion from Mk IC.
A further 12 DW I, Mk IIs were flown: L4212, L4221, L4227, L4235, L4352, L4356, L4358. L4374, L4391, L7771. R2701 and HX682.
Sources:
Reference List and Notes (pp.1-6) pertaining to: Vickers Wellington - Owners' Workshop Manual - 1936 to 1953 (all marks and models): An insight into the history, development, production and role of the Second World War RAF bomber aircraft
Murray,Iain R.
Sparkford:Haynes Publishing,2012.
NB. This information (on p.2 of 6), is provided by the author separately from the book. The Haynes manual format does not permit the inclusion of footnotes or references, but the following references pertain to the book as printed.
Those wishing to access this valuable information, can do so here:
http://www.sirbarneswallis.com/files...References.pdf
Col.