Unknown makers mark

Silvanak

Hello!

Has anyone seen this makers mark before? It is on a 19th century flask. Possibly once used for medicinal purposes.

Thank you!

Chris

As far as the mark goes, I am not seeing letters in this (as in a monogram) - Do you?

The shape suggests laundry bluing. Have seen many labeled examples in this specific shape. Your bottle dates to the late 19th century.

Silvanak

Thank you! There are no other letters or markings on the bottle, just that maker's mark.

Silvanak

We found another bottle of bluing agent in the same context (this in an archaeological project) so that would make sense. However, that bottle is much smaller, differently shaped and clearly labeled as such product.