In most cases, I think it would be a mess. The roll of the lapel (i.e. the point in which the lapel turns and straightens) depends from the cut of the collar. If you want to alter the roll you'll likely need to alter also the collar, or it will be probably too long. I've never seen a coat after a collar alteration, but I think it's difficul and costly.
Just wondering, anyway; you may have luck.
It's a style feature that was very popular during 80s and 90s. People sometimes used to button the last row in a 6x2 double breasted suit also in mid 40s, but note that in those cases the coat had the button hole on the second row. Coats with the so called 6x1 disposition, I think, are only seen in late 1980s and usually pair with extremely low button stance.Thanks! I thought it would be too much work. Was just wondering.
Any reason why some have button holes and some don't on the second row?
Era or just style of the jacket?
It's a style feature that was very popular during 80s and 90s. People sometimes used to button the last row in a 6x2 double breasted suit also in mid 40s, but note that in those cases the coat had the button hole on the second row. Coats with the so called 6x1 disposition, I think, are only seen in late 1980s and usually pair with extremely low button stance.