My grandfather's uncle, Frank Bretherton Woolford, was a mechanical engineer and died in 1938. I think the item you described may well have belonged to him. He was born in 1864, so the dates seem to be correct. If you have not already sold this item, please contact me, as our family would love to buy it from you. If it has already gone to a new home, I would love to see a photo of it, if you have one.
It was very generous of you to post these details - many thanks.