It is the Waltershield typehttps://www.carpentergoodwin.co.uk/Products/000100200011001100170001/VPL3907
That's a CBM, check in case it could be a Walterschied more expensive too
https://www.carpentergoodwin.co.uk/Products/000100200011001100170001/VPL3920It is the Waltershield type