Need help identifying unique triangular D. S. Co. bottle from England
BOTTLE - 2 sides are flat, one side is rounded so four placed together would form a circle.
Color - aqua tint
Bottom - REGISTERED 1904 D. S. CO.
Two seams almost to the lip
STOPPER - green tinted glass
Embossed LEA & PERRINS
The lady who sold it to me said it was a medicine bottle from England.
I would like to know what kind of bottle it is and its approximate age.