A 100 YEARS OLD DELUXE QUACKENBUSH : operation and servicing

I knew about their existence. By pure luck walked into a local antique gun shop and saw it there. The most deluxe of the QUACKENBUSH 22 rimfire rifles. How could I let it go??? Got it!!! Wanted to share some info, briefly functioning and disassembly/ service of the unusual bridge block. Again, I am a sucker for gun mechanisms especially in 22. Enjoy.