[QUOTE=duecavalle;8904288]
Daventry, thanks for this! I’m interested in a mare who’s registered and branded ISR/Old. Sire is a registered Oldenburg stallion (of the ISR variety), dam is Welsh, Section B. Is it incorrect to call her a GRP? If I resold, would her brand/registration be considered less desirable than, say a pony registered Weser-Ems, RPSI or half-RPSI with equivalent training/show record?[/QUOTE]
I think Honeylips covered most of it, but I am curious about this statement:
“I’m interested in a mare who’s registered and branded ISR/Old”.
Is she branded ISR, or ONA?
I also wanted to add regarding Weser-Ems - that studbook (Pferdestammbuch Weser Ems) is sort of like an umbrella organization for many different breeds of ponies and (mostly) small horses. They maintain separate studbooks for German Riding Ponies, Small German Riding Horses, Welsh Ponies of all flavors, Shetland Ponies, Dartmoor Ponies, New Forest Ponies, Haflingers, German Classic Ponies, Fell Ponies, Knabstruppers, Fjords, and Friesians (in addition to a few others).
WE maintains a very close cooperation with Oldenburger Pferdezuchtverband (the Oldenburg Verband), including operating out of the same office in Vechta, Germany. It is managed in North America by The Oldenburg Horse Breeders Society, and WE inspections are conducted at the same times and locations as the OHBS inspections. In North America, they inspect mostly for the studbooks for Deutsche Reitpony (German Riding Pony), Kleines Deutsche Reitford (Small German Riding Horse), and the occasional Haflinger.
OP - it is possible the mare could go into a lower mare book with WE, and her foals by approved stallions could receive WE papers, but since she herself is already registered ISR, she is - as Honeylips stated - an “American Sport Pony”, and not a GRP.
But if she is successful in sport, her registration status may not matter to a buyer, unless said buyer was specifically looking to breed her for GRPs.