I was once a currency, now I mark time. My value changes, yet I remain constant in history. What am I?

Category: Knowledge · Difficulty: expert

Hint: Consider a term that has economic and temporal significance.

Answer

Pound

Explanation

The pound has been both a unit of currency and a measure of weight, used historically to mark time in various contexts.

This is a expert knowledge riddle — one of the harder riddles here. The answer is Pound.

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