The 1956 Ferrari 500 TR s/n 0610MDTR at Helsinki GP on Eläintarhanajot (Djurgårdsloppet?) on 12 May 1957.  It was driven as entry #1 by Curt Lincoln of Scuderia Askolin to 4th place,<a rel="nofollow" class="external autonumber" href="http://www.wsrp.cz/nonchamp1957.html">[1]</a>  but not sure he is the one in the car in this picture.
Unknown photographer
<a rel="nofollow" class="external autonumber" href="https://i.pinimg.com/originals/55/fc/7c/55fc7c3c15e700680cfa80615decbbc2.jpg">[2]</a>