Signature is a well-known brand of Indian blended whisky, primarily manufactured by United Spirits Ltd, a subsidiary of Diageo, and is recognized for its iconic octagonal green-colored bottles. 
Brand Overview
Launched in 1994, Signature whisky is known for its blend of aged Indian malts and imported Scotch whiskies from the Islay and Highland regions. The brand is positioned in the premium segment of the Indian whisky market and is popular for its smooth and approachable flavor profile. 
Variants
The brand is primarily available in two main variants: 
Signature Rare Aged Whisky: This variant is known for its full-bodied, peaty character, blending aged Indian malts with aged Islay and Highland Scotch whiskies.
Nose: Subtle notes of sweetness, fruit, oak, and caramel, with hints of green grass and menthol.
Palate: Notes of oak, vanilla, caramel, and molasses, with a soft smoky note and a gentle sweetness.
Finish: Medium to long, with lingering peatiness and notes of spice.
Signature Premier Grain Whisky: This is a lighter and smoother blend, featuring eight-year-old Scotch and Indian malts.
Tasting Notes: Offers notes of caramel, vanilla, and a hint of spice, with aromas of oak and dried fruits.
Review Highlights: Described as a well-rounded and satisfying, versatile option for everyday enjoyment. 
Awards
Signature whiskies have received several accolades over the years: 
Signature Rare Aged: Awards include a Gold in "Blended Whisky (Under 10 Years Old)" at the 2010 International Whisky Competition in Chicago and a Silver and best in class at the 2005 International Wine and Spirit Competition.
Signature Premier: Named "Whisky of the Year 2012" at both the International Whisky Competition in Chicago and the World Spirits Awards in Austria