Industrial architect stool

Industrial architect stool.

Swivel Maple Seat
Year : Probably 1970's.
Land : Netherlands.
Material : metal and wood.
Colour : gray.

Stool with height adjustment via the threaded rod under the seat. This stool is in very good condition and shows signs of wear consistent with its age, including light traces, wear. There is no play in the seat post and it is easy to adjust.
Thanks to the strong design, this steel stool is still in use and can safely serve for another 50 years
The strange and unfortunate thing is that this model is almost never offered despite the fact that (I think) must have survived enough.

Measurements :
Ø seat - 34 cm. / 13.3 inch.
Ø legs - 54 cm. / 21 inch.
Adjustable in height from 60 cm. to 70 cm. / 23.6 inch. - 27.5 inch.