Brown Benedictine B and B embossed bottle.

 

Both Sides of Benedictine B and B bottle.

The bottle is embossed MARQUE DEPOSEE high on the shoulder.

Then BENEDTICTINE 

B AND B

It has a high kickup, which you can see therough the glass.

Marque deposee means registered trademark.

It isn't a very old bottle.  Obviously, machine made, but no glass maker's mark.

I haven't done much research but would take it to be mid-1900s, probably no earlier than 1937.

If you can correct that please do.

The liquor has a very old (1500s) and interesting history even though this particular bottle isn't very old.

From Bénédictine: History of French Herbal Liqueur & B&B which provides a long history