I can't help much with this one, Wolfie, but I will point out that it's not a 'ticket' at all in the usual sense. It appears to be some sort of 'consignment card', possibly issued as a receipt for unaccompanied goods.
Passengers have neither consignees nor contents and, unless the passenger was Houdini, the numbers of sheets and ropes shouldn't come into it ;-)
Further though, the destination was Redcliffe Wharf, which was a goods yard on the Bristol Harbour Railway and not a passenger station. The fact that the 'ticket' has been stamped on the back at Redcliffe Wharf suggests that it was used to provide proof of ownership when the goods were collected. (i.e. the consignor would have sent the goods, that were too heavy to post, from Cardiff to Bristol and then posted the 'ticket' to the recipient, so that he could show that he was entitled to collect them).
With regard to the 'replica' bit, I can't help wondering if the 'ticket' is actually a souvenir item, purchased from the shop at M Shed, which is part of Bristol Museums:
https://www.bristolmuseums.org.uk/m-shed/whats-on/train-rides/