The manufacturer's name is stamped just in front of the serial number.
You will have to contact the company to find out.
No published serial number data.
it was made in England
Rubber washers manufactured by the Acme Rubber Company can be found at a number of places. Amazon has a large selection, and even a local Walmart is likely to carry them.
1910
2006
1871
Just saw a site saying a serial number 88000 was manufactured in 1916. So it may give ya an idea.
No known sn data published.
No published sn data I am aware of.
Early 1930s
I have one. It was manufactured in 1923, the 100th year anniversary of the Chickering company.