Buchholz Relay BS25MA / E Eskom Spec 240-56063908 Rev 2
https://www.allbro.com.au/itemdetails/buchholz-relay-bs25ma---e-eskom-spec-240---56063908-rev-2?category=transformer-equipment&code=021---115%2fe&type=2&access=2&id=934a673b-8ccf-43c6-b5c1-4ddace6a9a6a