Timbo!
I have the SMER boxing. Panel lines are engraved (as are the mouldings for the markings). Ignoring the engraving for the markings, the panel lines are totally wrong. Lots of filler!
I have put up the major parts against a set of blown up Aviation News plans and they are an exact match. Rib detail needs removal with a rasp methinks and the engine is basic. Other than that (and for a fiver) it looks like a lot of modelling fun and I have serious plans to let rip on this one and post progress. Maybe some time this year..........
As for resources, try this:
http://plane-crazy.purplecloud.net/Aircraf...ine_walrus.html
there was another site that I can't find at the moment which I made a note of somewhere and basically shows the guts of the RAAF restoration of HD874 and one or two others. I will dig it out. In the meantime try these:
http://rosssmodels.hobbyvista.com/RAAFwalrus.htm
Coming back to the Airfix boxing, I see Argentinian markings. As I have said before someone at Airfix/Hornby needs to be cogratulated on imaginative options.
Hope this helps
MH