Here are the pics of the Staudenmayer from the above auction.
It looks like there is both a trigger safety and a decocking safety lever. Only example of this that I can recall.
To my eye, simply one of the most beautiful air rifle/shotgun ever made. The graceful lines of the cocking lever may be due to the big main spring and really having to give it a good pull to cock.
From some new information found from a case label from a different auction, we can now date this exclusive Staudenmayer model (there are no examples of this gun with other makers names on it.) to 1799.
This is a previously unknown Staudenmayer label. This label answers the question that Shaun Brown brought up about the Staudenmayer invoices to the Prince of Wales dated 1799 with the 35 Jermyn St. address. It's was Brown's opinion that the invoices were in error about the street, since only address otherwise associated with Staudenmayer is the 35 Cocky St. This label puts that idea to rest. Staudenmayer did work from 35 Jermyn St. because this label tells us so. The addition of "From Mr. Mantons, Dover Street" is of course where Staudenmayer apprenticed. This is the earliest known Staudenmayer case label. It would be circa 1799-1800.
Note: Staudenmayer could produce his air guns without being a member of the London gunmakers guild. The guild had no authority over air guns, because air gun barrels did not require proofing. Only members of the guild had access to the proof houses. By 1801, Staudenmayer became a member of the guild.
This almost certainly is Staudenmayer's first design after producing his version of the Girandoni.