Sweden 1893 PSE 10 ore overprint "Railway" Express Mail

Postal Stationery Envelope upgraded with 2 ore Yellow Yvert 29 (2), 6 ore Violet Yvert 33, and "10 on 12 ore" Blue Yvert 39, tied by PKXP. No. 72 Railway datestamp envelope endorsed EXPRESS MAIL. Very Scarce. (pt)    ID: 7217