The rivet holds the base plate and the body together.
The base plate is set in the body.
Non rivet.
The stamp is some characters recorded in the base plate . (product number, model name, scale, production country, design registration mark, maker name, and manufacturing year, etc.)
Seat rib.
The seat rib might be in either of the left seat side or the right seat side.
Improvement window.
The improvement window is a rear window that is reinforced for the Sound Tomica.
The Label means the sticker of an opaque material such as paper.
The Seal means the sticker of a transparent material such as Teflons.
The Decal means the sticker of the water-soluble bonding material.