stockholmsolympiaden

That would be Prince Vilhelm, Duke of Södermanland of course. Source: en.wikipedia.org/wiki/Prince_Vilhelm,_Duke_of_S%c3%b6derm...

The three men in comfortable armchairs are prince Wilhelm with a white hat, his brother the crown prince Gustav, who was king of Sweden (Gustav VI Adolf) from 1950 to his death in 1973 and their father, who was king (Gustav V) at the time for the photo until he died in 1950. All from the family Bernadotte, one of Napleon's marshals that was invited to become king in Sweden in 1818. The crown prince had died, and measures were taken to save the monarchy.

this is awesome! it would be great to see this in the modern olympic games.

The 1912 Summer Olympics were held in Stockhom, Sweden. en.wikipedia.org/wiki/1912_Summer_Olympics

This is definitely NOT a 110m race, since no such race was ever contested at an Olympics without hurdles. Running in lanes through a curve suggests either a 200m or 400m, but this is most likely the 400m. The background is where the present day finish line is (and I believe where it was in 1912 as well), and the relatively even stagger among the runners again suggests that this just after the start of the 400. There are five runners in the field. Assuming that this is the final, that also points to the 400 since there were five runners in the 400m final, and six in the 200m. From the results of the 400m final, the runners, from right (lane 1) to left (lane 5): 1. Ted Meredith (USA) 2. Hanns Braun (GER) 3. Charles Reidpath (USA) 4. Carroll Haff (USA) 5. Edward Lindberg (USA) The uniforms that are clearly visible match that lineup. Edited to add source: bottom of page 64, Olympic Track & Field statistics book, published by IAAF (International governing body for T&F). Lanes are in parentheses next to order of finish. www.iaaf.org/mm/document/competitions/competition/p1-181_... -- Seen on your photo stream. (?)