@bickelhaup wrote:
I can't find anything with using those search words.
Hopefully will.sf may have some further information to share. In the meantime, I think you would probably do better with a Google Images search using the characters themselves ("銀 马") rather than "Yínmǎ" or "Silver Horse". (These are the characters beside the horse head design on the packaging). Even then, since the phrase is far from uncommon, you'll find that a search brings up many, many unrelated results.
