​This Casella T6554 thermograph was made by the C F Casella company of London.  It's shown in the 1958 Casella catalog available on this website, but not in the 1948 catalog.  I suspect this is of newer manufacture.  I currently use a Taylor Instruments No. 86 chart on it. The clock mainspring is rather weak, it has trouble running for seven days.

Go to Casella catalog page.

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