£46 +vat bit over the top for that i think but the other one i think i will go for
Because its a genuine BSA gauge. Nothing wrong with the cheaper versions. Your only using then as a rough indicator as they are not that accurate. Or in your case, to fix a leak!!
Have you broke the gauge? or are the threads leaking?
thinking of selling it after i fix it so the cheaper one is for me looking for a huntsman in 177 i think