Summary

Printing using the Tanker model T Gauge 1:450 Early Freight Wagons by alexhondsmerk on Thingiverse: https://www.thingiverse.com/thing:6966817

But scaled down to 2.5cm to roughly match the Ticket to Ride plastic train playing pieces, specifically the limited edition deluxe train set. Painted with acrylic paint then sealed with one coat mod podge, then one coat clear nailpolish.