As I was asked about the purpose of the lever on the left side of the action before: It’s the handle of a screw that is part of the Austrian takedown system of these copies of the Alexander Henry 1869 falling block action. While Henry used a peculiar barrel detaching system, the Austrians detached the buttstock with lock and trigger mechanisms from the action body with breech block and barrel. You can see the parting line in the photos. To take the rifle down you remove that screw and unhook the two parts.
This rifle apparently passed the workshop of Franz Neuber in Wiener Neustadt who installed those Tambour safeties. About the Tambour safeties, see here:
http://forums.nitroexpress.com/showflat.php?Cat=0&Number=351696&an=0&page=2#Post351696
A Haenel model 1900 with another Neuber – Tambour safety may be seen here, page 10
http://forums.nitroexpress.com/showflat.php?Cat=0&Number=230186&page=0&fpart=10&vc=1