ET22-1001 (ex-ET22-701, ex-ET22-501, ex-ET22-301) it's one of two locomotives (the second is ET22-1002), that were provided in modernized bogies, authomatic coupler adjustion ability, and sockets for multiple driving.
photo&scan: Jerry D. Stawarz, Poznan Franowo Depot, May 03, 1998
[http://panda.bg.univ.gda.pl/~jareks/pekape]