Glendronach was built in 1826 by James Allardice, and rebuilt following a fire in 1852 by an individual named Walter Scott (although not the one you might be thinking of). It eventually passed into the hands of perhaps Scotland's greatest distilling dynasty, the Grants of Glenfiddich. Charles, the youngest son of William Grant procured the then-silent distillery from the government in 1920, and it remained in the family until they sold it to Wm. Teacher 40 years later. The Grants and Teachers were early champions of the single malt category, and distillery bottlings of Glendronach were produced for most of the 20th century until it was mothballed by Allied Distillers in 1996. The distillery was revived in 2002, and has since become one of the strongest single malt brands in the world.
The Glendronach 15 year old was one of their most popular expressions before its closure in 1996. Launched in 2009, the Revival was no less well-loved, and the news in 2015 that it was to be discontinued was met with much dismay. The distillery's mothballing between 1996 and 2001 meant that the maturing stock in the warehouses eventually ran too thin to sustain it.
Aptly named though, the Revival reappeared in September 2018. Although they are packaged as the same product, this and its pre-2015 predecessor are subtly different whiskies. While the older release was matured exclusively in Oloroso sherry casks, the revived expression is a combination of Oloroso and Pedro Ximenez matured whisky.