I think we should hold the identity hostage until we get another episode of The Coin Show... Just kidding Mike - love the show and sad it hasn't been on for a while. I'm afraid I can't help with attributing the coin though.
i've seen one of these thing somewhere along the way. like a philip ii style thing but with the horseman on one side instead of the reverse. oh wait, i search the old threads here and found this..... https://www.cointalk.com/threads/unknown-coin-found.278222/#post-2412639 i knew it looked familiar.
The question is how an obvious fake gets lost and found metal detecting. There seems to be a cottage industry in dirtying up 'bad' coins in hopes of making them 'better'.
And both have that mushy fake look about them. Curious, is there a double horse coin obv. & rev.? I can't recall seeing one.