Watches and wall clocks with roman numerals or no symbols on at all annoy me. Mainly because it causes a delay if I'm trying to figure out what time it is.
In that case, why don't you just imagine that the numbers are where they usually are? Well, I do, but it does make the process slower. If the handles are on a full hour (3 'o clock, 2 o' clock etc) it isn't so bad, but if they're not and are also in roman numerals or any other shape that isn't the usual 12, 1, 2, 3 and so on then I seem to come to a halt. Brain can't process. This is probably due to the fact that my visual processing ability is abysmal.
I had to keep time recently, and my sister told me to get my phone.
"Ah, you'll have to get your phone, the only clock in here is in roman numerals and I know that you can't understand that type".
So I did. The only type of watch where the numbers aren't where they usually are that I like is this one below...
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24. Possibly B.A.P.