I wish I had a better lead to go on here, but in disassembling the tail of a Wuben I331 recently, I realized that it had a forward-clicky almost the exact same size as the Omten 1288 (like what’s in the S2+, M1, C8, and many others). It’s round and slightly taller, but probably close enough that it would swap into many without much effort or fitment issues.
I looked all over for identifying markings, but couldn’t come up with anything. Perhaps I can reach out to Wuben and see if they’ll share details about it.
