Was it a special train? In the 2009 timetable I couldn't find any train from Warsaw to Tallinn (even to Vilnius there was only a bus back then).
431 179 with night train to Koper and Rijeka
Local train 3402 from Varaždin to Čakovec
Avtovlak to Most na Soči leaving Grahovo station
B 1205 "Adria" from Split to Budapest Keleti
"Crocodile" and the Basilica in Licheń
Regional train from Aigle to Les Diablerets
Regional train to Leysin-Grand-Hôtel
Special train from Ostrołęka to Wyszków
Matterhorn and train 263 from Zermatt to Gornergrat
Thank you. SN82 are running mostly on Ostrołęka — Chorzele services. Luckily, Koleje Mazowieckie share information on train formation at their website. Files are listed below timetables and named "Zestawienie pociągów KM kursujących w dniach [running dates]", e.g. https://www.mazowieckie.com.pl/pl/podstawowe-informacje/rozklad..2024r
SN82-003 at the Ostrołęka station
Local train 19584 from Ostrołęka to Tłuszcz
Di 3.616 and Di 3.642 with a special train to Trondheim.
IC 2074 "Uthlande" from Berlin Südkreuz to Westerland (Sylt)
