Batch 2 was distilled in 1999 and has been fully matured in pipe ports, the first from the distillery to spend all its ageing time in a type of wine cask.
Batch 3 was made a year later and matured in sherry casks. It also uses Optic barley instead of the Golden Promise used in the other Origins whiskies.
Both will have an rrp of £38.50.
The Origins range of special bottlings was launched two years ago to highlight how small changes in the whisky-making process can shape the final character of a malt.
Distillery manager Keith Cruickshank said: “These two new batches are quite different but still recognisably Benromach in style.
“Because we are such a small operation, with just two distilling staff, we have the freedom to make changes to the whisky-making process, while maintaining our commitment to handmade quality.”?Benromach has also recently repackaged its Vintage Speyside single malt, replacing its outer box with a brushed metal tin. It carries an rrp of £299.
Benromach is owned by whisky wholesaler Gordon & MacPhail, which also has a whisky shop in Elgin.