What number is it? Or is it just the lock without the lozenge.
What is for sale is just the lock, it fits any of the "Lozenges" which are unique to each wheel configuration. I also have Lozenge No 39 (also listed) for Bailey Phoenix and (other Bailey caravans)
By having two separate items if you change caravans you only need to change the lozenge, the lock can be retained for use. Or you can buy just the lock (like this) and source the correct lozenge on eBay or similar. Hence me listing the lock and the lozenge as two items.
Alko list all the various caravans so you can search for the right lozenge for your van.