Correct
It's probably five-foot gauge and used the Russian variant of knuckle couplers.
It's interesting that it doesn't have the dual buffers and the turnbuckle coupler.
I hope Latvia and Lithuania got one each as well.
Here is a link to some infos:
https://www.steamlocomotive.info/vlocomotive.cfm?Display=11534
I was there almost exactly a year ago (Sept 14,2018) and saw it.
https://photos.app.goo.gl/vc6ZAF6esRNiG1fX9
-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/)
This Jack May photo is included in his "Baltic" trip report, posted about half-a-year ago in the Transit Forum:
Recently, a member of the Jerusalem Railfan Spcoety visted Tallinn (Talilin) and took two photos, which I edited to one:
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