Hi Guys,
I've been becoming familiar with a lot of the Swedish narrow gauge lines over the past few months and found a great video showing some real 891mm (roughly 3' gauge) Critters on the JTJ. The Critters begin at roughly the 5 minute mark, but one of the line's 0-6-6-0 tender Mallets shows up at the end as well. Here's the link.
https://www.youtube.com/watch?v=uJUuYzpGMf0Best Regards,
Glenn