British 4.2-inch Heavy Mortar

[wally2960]

Thanks for the detailed mesuraments and the quick reply. I have another question concerning my restaurationproject: which kind of sighting were put on the mortar? After some detailed examination of the wartime photo's I can't see much difference with the 3 Inch mortar sights. Was it common to put 3 Inch optics on the 4.2 inch mortar? greetings Wally