Seeketh and... well, here it is. Posted with picr.de / Bilder&Photo

It's a GunsAmerica auction, price $4299.00, described as such (ver batim):

Holland+Holland, 375 Express, takedown, Mannlicher Schoenauer 1903, #26012, fine bore, 13 3/4 LOP, barrel marked Holland & Holland, 98 New Bond St, London, pistol grip trap door, SAFE marked in gold. DISCOUNTED $700!!