Hi -
I got the original panto'd nitto drop bars with the bike as well

The stem is the original Ritchie. The saddle is a Regal, don't know if that is original or not - may have been an upgrade as well.
The seat post is the original Sakae CLE 100 I believe...the seat post pictured is different than the one I got.
The original owner, upon buying the bike, immediately upgraded the Shimano group to the Dura Ace 7402 - then put it in storage!