It will be on the receiver side or bottom
Browning did not make a Model 11.
Need the serial number to answer.
You'll need to post the model number. Winchester serial numbers were not unique.A model 12 can have the same serial number as a model 11 or a model 97, but all were made in different years.
I also have a model 11 with serial number 17xxx. Remington told me it was produced in 1905 the first year they were made.
1912
1911
1908
Early 1912
Manufactured 1909
1926
1911
1913