This lock is fitted to an Mid 18th Century building in Whitwell near Hitchin The spring had broken stopping the latch from returning and threatening to get stuck. I looked though the box of parts from the van and found a spring that fitted just right. My customer was impressed and asked me to look at another old lock, when I removed this lock I recognized that I had a few of these locks back at my office. So next week I will return and make a working lock from the spares. I h