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Looking at a brief sample of Clarendon LT Std Roman earlier (just the &!) I was pleased to be able to scratch that itch in my mind which said “I've seen that in something particular…”: Belle & Sebastian: The Boy with the Arab Strap (possible minor differences in weight aside — it's still a Clarendon and not Bold, Black, Heavy or Light)
There's another itch though: I have a feeling it's used in some (UK, I think) product or brand which I can't place. Ring any bells?