Good morning,
I don‘t know if that helps you, but I have a 1116 and a 1118 that both have screwed removeable links. I think both are the older execution with the circled 11 on the clasp.
edit: It is also possible, that either the screws or the springbars were destroyed and replaced by friction pins.
Also the links I marked on your pic look different, the right one more flat than the left one. Maybe check that with a caliper, same goes for the other links on the other half of the bracelet.
kind regards
Max
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