I have two Friez 620 barographs.

The first is a 1943 Bendix Friez 620 barograph. It has the original Bendix Friez clock drive which works well. I use Belfort 1068 charts which are 7 day and cover 28 to 31 inHg.

The second is a 1942 Friez 620 barograph which I found in very poor condition, it looked like it had been under water. The Friez clock drive was shot. I replaced it with a 7 day clock drive from a Belfort 594 hygrothermograph. I had to cut down the hygrothermograph drum to fit the barograph case. I gave the barograph a good cleaning and oiling and it is working but not 100% yet. It's shown with a 7 day chart in mb from Metcheck in the UK, chart 2M.

A catalog page from the 1931 Friez Catalog No 5 showing the Model 620 Barograph is shown here.

Go to Friez catalog page.

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