This is what found, some blueprint http://vlaky.bestsite.cz/files/obrazky_k_clankum/navestidlo_azd70_02.jpg size of boards (could be a source for determining scale of these pictured lights) http://vlaky.bestsite.cz/files/obrazky_k_clankum/navestidlo_azd70_05.jpg also i find out some links dont work ...