You're bidding on a vintage-to-antique, large - 7 1/4" X 3 1/4" and nearly 8 oz. (226 g) - cigarette case. Plain design, no engraving or monograms, marked "Sterling" inside with manufacturer's mark for R. Blackinton & Co. - a manufacturer operating in North Attleboro, MA for over a century from the 1860s. I'm guesstimating early 20th century, circa 1910 or so period for this piece.

Note, the item does have moderate, visible scratch wear from age and use - see photos - solid, though, with no dings or dents, and remains bright in appearance. Intact and fully functional. 

Please review photos carefully to make your own determination of condition and appeal, and don't hesitate to ask any questions prior to bidding - thanks for looking!