It is my understanding that when a Mannlicher Schoenauer rifle or stutzen was ordered from Steyr with mounted telescopic sight during the period prior to the Second World War that mounts and scopes were installed by guild shops in the Steyr area, not at the factory of Oesterr. Waffenfabr. Ges. Steyr (Steyr Werke after 1926). This may account for variance in the particular mounts and methods used while being essentially alike.

Member Kuduae could likely provide more precise information. If so, I would trust any such details for accuracy as Herr Eichendorff is very well acquainted with the history of MS and other early 20th Century Continental firearms.

My 1922 proofed M1910 Take Down Model wears a claw mounted Gerard B that may have been installed in England (as the rifle bears English proofs) or at Ceylon where it was purchased 'second hand' by my Grandfather in late 1931. As the front mount is dovetailed to the barrel rather than saddle mounted I presume it to be an 'aftermarket' installation.

From 1939 Stoeger Catalog

Post WW2 Steyr 'factory' mounts (also from Stoeger)

Various images, swiped from the 'net, of 'Vienna Snapper' mounts in no particular order: