Hi Bob, and thanks for highlighting the
82-218 mortise lock. I will need to swap out the thumb turn on my old handle set to use the lock so that the spindle of the thumb turn fits the
82-218, but that should be fine if I can find a fit. The thumb turn could look the same but could also be a small lever hopefully with a brushed silver metal look of some sort. I've attached a photo and the approximate measurements follow:
Overall length is 1 3/8", spindle length from flange to tip is about 1", diameter of cylindrical part that fits into door handle plate is about 3/8 " and the square-sided spindle itself is about 1/4" on each side and about 3/4" long. I hope this is t confusing.