DVD artwork, Goof

Just picked this DVD up recently, Good horror, freaky ending, very, very britsh etc. As you might expect for a low budget flick from the 60's there's a couple of Anochronistic Goofs' here and there, Plastic drainpipes etc, but it's easy to overlook in this sort of thing in film.

Expcept that the actual DVD artwork inlay feature's a house that's more 1945 the 1645, in fact it looks like it could well be double glazed... The first thing I noticed after reading the synopsis and opening the case. I wouldnt of spotted it in the film, could of easily been airbrushed out for the cover... but there you go ;)