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Yep, me too. Not disagreeing. Maybe they weren't water buffalo but some other kind of horn or as I hinted at a younger bull.
Dyeing was common but some will be black thru & thru as well.

Water buffalo horn is black but the younger part of the horn ie the centre is lighter in colour. Just a useless fyi . :)

Similar design to William Wood of Liverpool. 86 miles away. Wonder if they were related.