Old bottle of Dewar's
Without a label it is very difficult to date - however, based on these photos, we've been told this bottle probably dates from c1910s - 1927. But....can't really be sure which product it would have been as Dewar's produced a range at that time. Since the bottle really can't be identified, no idea about value. You could always try mctears.com or bonhams.com. Keep us posted if they give you any additional information.