Here is the same "Wiener Schnaeppermontage" = Vienna snapper mount factory installed with a Kahles "Heliavier" scope on my M1924 .30-06 Mannlicher-Schoenauer, a "leftover Sequoia model". It also has the same serial number, 299, like the rifle. IMHO these mounts, offered as a factory option by Steyr pre-WW2, were mostly handmade and -fitted, as they all differ in details. So there is little hope to find a scope and tops that exactly fit existing bases.