From a first batch of barographs
This is one of the very first batch of standard barographs produced by Richard Frères of Paris.
With the serial number 1252 it would have been manufactured c.1890 – the third year of production.…
This is one of the very first batch of standard barographs produced by Richard Frères of Paris.
With the serial number 1252 it would have been manufactured c.1890 – the third year of production.…