12" Chinese Ox Blood Double Gourd Vase Qing-Kangxi Impressed Seal Mark

I found this while shopping the thrifts the other day. I did find the mark on a pair of blue gourd vases on Liveauction's Site. They say it's a 19th century Qing-Kangxi seal mark. Their vases have glazed bottom, but mine does not. Just wondering what everyone here thinks of this. Thanks for any help and expertise, -Mike-

Nice find. Best to take it to a good auction house or museum that has an expert in Chinese porcelain to check it's not a later copy.

Thanks Naomi.. That's been the general opinion so far. Just interesting enough to merit further investigation into it's authenticity. Thanks for your help. -Mike-