Well done on getting a Jacobsen Chief, they are well made machines and certainly (in my view) better than several other manufacturers of the time. Although not as popular as Wheelhorse the Chiefs did sell in some reasonable numbers in the UK.
Jacobsen Chief tractors were sold in the UK by Horwool, their main office and works was in Romford, Essex and the midland sales and service was at Acocks Green, Birmingham.
I have the UK brochure for these tractors detailing the specifications and all the available attachments. I’ll attach it as a PDF.
Price is always a tricky question to answer as it’s always down to what someone is willing to pay, but in this case I’d say it’s worth exactly what you paid else someone else would have bid more.