Can anyone supply a photo of the Hauck "Rigid Side Mount" mentioned on his business card above?

Roger Barlow was in business in Los Angeles circa 1950 dba International Motors. My Jag Special was built in his shop by Phil Hill (for Hill's brother-in-law Don Parkison) after hitting a tree at the 1951 Pebble Beach races. We still run it at the West Coast Vintage races. Barlow's interest in those ultra light O/U Bretton guns has caused me to consider buying one several times - but thus far I've managed to avoid doing so.