This listing is for a 1938-F 5 Mk Reichsmark Hindenburg silver coin, graded MS62 by PCGS.  

This mintmark designates production in Stuttgart, which produced only 740,000 in 1938. In comparison, over 6 million were produced in Berlin in the same year. 

Of all the year and mintmark combinations for 5 reichsmark J.367, only the 1936J, 1938E, and 1939G have lower mintage numbers.