Here's a very interesting M1900 variant with extended finger guard and 'grip safety', along with stock differences.

From a Maynards auction listing with only three images. Serial No. 133, sold for $1300. CDN against $700 - $900 estimate in November of 2019. Here's the text:

Description: Mannlicher-Schoenauer, M.1900 bolt action rifle,
6.5 x 54 Mannlicher Schoenauer, 570 mm barrel, full walnut stock with checkered forearm and pistol grip, grip safety, serial #133 (non-restricted) (this firearm might be permitted to be imported into the US)