Does it look like a cheekpiece might have been removed? Likely when the comb was altered?
The comb nose fluting doesn't look right, or even professional?
If you look at the comb of Newton's Wundhammer it is much narrower and the fluting almost delicate.

Anyone who knows me knows I'm very skeptical about attribution although I just finished a story about a Seymour Griffin rifle that Monte M. identified across the aisle at the Bozeman Gun Show.