Work in progress.
The design is from
this book. It gives a lot of detail and history, with "correct" measurements and variations.
Believe it or not they are quite comfortable. I guess you need to be not far off Reitveld size!
I've nailed the back and seat with copper roofing nails instead of the books recommended screws, which don't look nice. Apparently Reitveld nailed them originally.
The frame is quite sophisticated with 16mm dowels at each crossing. Because of the layout they lock where three cross over.
I've got to touch up the enamel colours where necessary and then follow up with the black water based last as it will be easy to clean from the enamel.
Then wax polish the black.
https://www.holland.com/global/tourism/holland-stories/mondrian-de-stijl/gerrit-rietveld.htm