I bought two units and they fit perfectly in replacing the original locks.

The description said that only the brass version was reversible. The black iron ones I received were easily reversed by removing 1 screw. India made quality, but function better than my 100 year old originals. I put off ordering for years due to the price, but now my wife stopped bugging me (about her doorknobs anyway), so I guess it was worth it.

I do wish the lock had come with a template. It doesn't have instructions for switching the hand so here's mine. On a flat surface unscrew the lock and turn the latch over hooking it back in place, be sure the springs are in place before putting the plate back on.

If you had these authentically re-created to exact standards, they should work for a left or right opening door by changing the position of the catch. I had to open the lock and do some filing to make it work. I did like the heavy duty brass keys.

The three screw holes of the Backset Rim Lock fit perfectly to the existing 150 year old three screw holes. What a pleasure to see the restored door looking and working as it did 150 yeqars ago.