YorkMinster slide rule made in England in good working order. Slides easily and is in good condition. I have many measuring tools for drafting, architecture and machinists, that said, i have never seen this particular manufacture or type and do not know enough about it but I wanted to offer it to those who may be interested. I am very happy to receive input and to take more photos and measurements.
International orders please contact me for shipping quote. Shipping is not free.