|Ketchum Builders' Supply, Old Auerbach Bldg. Wrecking Crew, 2/18/35|
Here is another WTF photo from the digital archives of UDSH.
The description and my limited newspaper research reveal this is the wrecking crew from Ketchum Builders Supply Company that in February 1935 demolished the old Knutsford Hotel (which was also the old Auerbach building and the old Sears Roebuck building).
The old Knutsford Hotel was located about 275 S State Street SLC. The site is currently occupied by the Ken Garff Automotive Group Corporate Office Building at 111 E Broadway SLC.