A flintlock pistol ... with a Portuguese lock.

[fernando]

Originally Posted by Dmitry

That is mighty early for a captive ramrod. I was under the impression they became popular closer to the end of 18th century, than to the middle.

It appears that the captive ramrod (officially) appeared by the 1800's.
Most possibly this pistol 'was called' to service by the time of Napoleonic invasions and, following the contemporary Britsh use, had the ramrod swivel applied; and maybe also the lanyard ring extracted.
Many things happen during many weapon's history.
Fernando