This detail is from a Chas A. Stromberg and Son short scale tenor banjo, or actually a “tango banjo”, which is visiting my house for a while.
This is a detail from the resonator which was made by the Vega banjo company.
Best guess on the age is 1910-1915.
In another post I will go into more detail about this banjo and the helpful sources for dating.
Canon 5Dii, EF 100/2.8 macro lens