Paul and Vincent were based in Blackhall Place, Dublin. They appear to have been a large company with a foundry. I always understood they made farm impliments but they obviously also made pots as well. They also were involved in chemicals as well. My Gt Grandfather worked here and came to New Zealand when he turned 21. His Mother was the sister of the brothers who owned the business.
I hope ths is of some help to you. I apologise for taking so long to respond