McArthur field microscope files:

The files are scans of double sided A4 illustrated data sheets on McArthur microscope configurations when made by K W Kirk and Sons Ltd, Cambridge, UK. 

Data sheets are enclosed for the following configurations - biological, metallurgical, surface inspection, interferometer. Also price lists dated 1988. 

The contacts for the company on the data sheets are no longer valid (company no longer exists?).

Scanned at 150dpi and saved at minimum compression jpeg. Should print well on A4 sheets.