I tried to do a daiquiri with Angostura 1919 rum as Jeffrey Morgenthaler suggested.
4cl of 1919
2cl of lime juice
1cl (or more) brown sugar simple syrup
I poured the ingredients in the shaker filled with ice and gave it a few shakes.
I think 2cl of lime juice (approximately a juice of one small lime) is too much as it tasted very sour. I tried to balance it out by putting more simple syrup which made it a little better. Just how sour is a daiquiri supposed to be? Also the cocktail doesn't look really attractive. It looks like mud and thats why I think one should stick to using white rums with this cocktail.
This could make an interesting cocktail if done properly. The vanilla of 1919 really comes out in this cocktail.
