S2C, John Izzo from Telescope Shed told me the mirror is made in the US.
One more thing worth noting. The secondary is just a touch undersized for the way the scope is set up. At high powers you can just see the mirror clips in star images defocused (towards the secondary), all three simultaneously only just. If you move the star image off centre by only less than 10 arc minutes, you cannot see more than 2 mirror clips. Extending the OTA and shortening the focuser travel (which racks out a long way) would yield better illumination of field without needing a larger secondary.
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