Pembrokeshire Snath

A couple of weeks ago I went to London to install a sculptural staircase bannister as part of my day job as a woodworker.  While I was in the south-east I took a side trip to Reading and spent a wonderful few hours looking at and measuring hay rakes and rakemaking tools at the Museum of English Rural Life.
During my visit I was given permission to look through their full collection which isn’t open to the public and found this interesting snath from Wales. It looks like a cross between a curved English snath and Eastern European straight snath. Unfortunately there was no blade to go with it to show the fixing method and style of blade.
Does anyone have any more information about this style of scythe?