This study presents recent data on old church tower clocks – from the 18th-19th century – and their master craftsmen in the Bihar region, as well as a summary of the results of our research in this topic. We recorded data or a series of data on our field trips, as well as on the basis of archival sources, relating to altogether 62 clockworks, and/or identified still existing clockworks and artefacts. Of these, 49 could be linked to a master-locksmith or workshop, which is the main benefit of our research. Most of the surviving artefacts, as well as the work of some of their masters, were largely unknown to the sparse literature on the topic. Significant additions have been made, first of all, to the work of the locksmiths of Nagyvárad (today Oradea – Romania) and Debrecen, as well as of Pankota (today Pâncota – Romania) and Nagykároly (today Carei – Romania).