The Willenhall M1C is a 5 lever mortice deadlock with a slightly larger case than usual. The 67mm case has a 40mm backset and the 80mm case has a 53mm backset. It is supplied keyed to differ and comes with 3 keys.
| Brand | Willenhall Locks |
| Stockcode | L9403 |
| Backset | 40mm |
| Barcode | 5055120614199 |
| Case Finish | Blue |
| Case Height | 76mm |
| Case Depth | 67mm |
| Finish | Polished Brass |
| Forend Length | 133mm |
| Forend Width | 25mm |
| Keyed | Keyed To Differ |
| Keys Supplied | 3 |
| Mechanism | 5 Lever |
| Pack Quantity | 1 |
| Packaging | Boxed |
| Manufacturer Reference | M1C-115 |
