Need a replacement Lock

Thanks for posting. I am afraid we can't cross-reference that label with anything. In general the only way to know for sure what lock you need is to see the original. However, reports of locks falling in the door by mistake are almost always associated with the 82-218 Mortise Lock. Look over its dimensions, compare to the cavity and hole spacing in the door, and see if you think this is it.

Profile view of 82-218

Opposite side view 82-218