218-9 Cal. running at 18000 A/h 🧐

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Hi everyone,

I have a question about my new 20368-2 Polerouter from 1961 with Cal. 218-9. What do you UG specialists think has been done to it / changed to make it run at 18000 A/h instead of spec 21600 A/h?

Only thing I could imagine is if someone has sourced 218 base movement for it but kept the (I assume) original 218-9 bridge. But does these even fit together?

Or is some side noise from the movement confusing Weishi to think it's 18000 instead of 21600?