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Hi Doug,

Yes that’s within spec – which is particularly affected by temperature, so the nearer to room temperature the actual clock crystal is the more accurate the time will be (the advantage a wrist watch has is a fairly constant temperature) so storage temperature and internal running temperature will affect it
The only use of the clocks is for event logs so it’s helpful but not essential to have them synced if you have a technical problem that you need help from A&H with

Hope that helps

Dave P. @ A&H