20th Century Rider
Conductor
Yes it does... but does that define it as a speciality restaurant?... what would be the definition of what a speciality restaurant would be on an Amtrak train? And just what is the speciality food that was served? Was it regional? Was it some kind of ethnic or ethnic mix? The parlour car served meals which were probably a step above what was served in the dining car... perhaps 'California Cuisine... but does that make it a speciality restaurant of Cali Cuisine speciality food? Maybe it does.Pacific Parlour Car came pretty close to checking that box.
Here is a fun take on what 'speciality restaurant' on a traveling train might mean... but even this doesn't seem to answer the question???...

all aboard for the dining car!
Ah, the romance of trains. Is there anything more elegantly delicious than a freshly cooked meal served in a dining car? * THE DINING CAR OF THE SOUTHERN CRESCENT by John Campbell The…