They appear to be Arts and Crafts Era as I have found several other items similarly stamped 'STERLING'
5.25" tall by 2.1" Base by 3.1" lip (140mm by 54mm by 79mm) weight is 259 grams (lightest weighs 250 grams
It looks like a Springbox antelope. I suspect that it could be South Africa, Kruger Park associated?
Help Please. Thank you