Company called ESS (Equine Security Services?) put this diamond in front of their freezemarks to distinguish them from Farmkey and Freezemark. Don't know if they're still in business. They did a pony of mine in the 90 s.
What breed is the mare? I think some breeds have specific marks - could that be a clue? In saying that I think a diamond may be used in Exmoors so possibly not relevant
hi shes a 15.1 possibly welsh d cross heinz 57 i have no idea really, i bought her last yr from bradford i have been in touch with some freezemark companies and they said the ess have gone out of business i really havent a clue of where to start tracing any history she was bought with no passport so nothing to go on there but someone somewhere must know this beautiful girl xx