"17th century Spanish School" is altered copy after Van Dyck

Bearnes Hampton & Littlewood, from England, sell on 12 july 2016 a "Spanish School, 17th century" Armoured horseman, estimated at £300 to £500.

It is a copy (with variations) of the famous portrait of Charles I by Van Dyck. No idea why it is supposed to be Spanish, perhaps some romantic idea of Don Quixote playing in the mind of the auctioneer? The painting's not all bad, it starts of course from a brilliant composition, but with some basic cleaning a decorative work may appear. Nothing more than that though. Just somewhat unusual, also in its description, not valuable