They were built in what is now Luhansk for not only East Germany but other Eastern block states. Oleksandra or Sascha for short is a fictional addition to the first series and came to Germany in 1974. She was Charlie’s bestie and when Charlie became a generator was heartbroken, but promised to look out for Heinrich. Shortly after the German reunification her class was sent to be scrapped, but her driver bribed the owner of the scrapyard and hid her in a shed. 40 years she gets discovered by Henry and Bear and gets restored. She endearingly calls Bear “Mishka” which translates to little bear because he’s a tad smaller than her. She’s rather timid despite her great strength and speed. One annoying flaw her class in particular has is that they can’t heat coaches themselves. So they were a 140 km/h freight loco. She now lives on the Klein-Sodor-Bahn with Henry, Edward and Marie( a diesel shunter).