Results of your Query

Model Mania is a shop in the Finnish capital of Helsinki which started importing model cars around 2006. Under its own name, the company released a 1/76th scale model of a Nalle-Sisu truck which was sold as a promotional model by the Finnish postal service. The model is made of diecast with many plastic parts and was manufactured in China. The post office truck was limited to 5000 items. Other models for the same series of post office vehicles were made by Motorart and WSI Models.

Sisu KB-121 BG/4000
Finnish postal service; Finland 1968
Model Mania (China), no. posti4
diecast, scale 1:76; acquired 2013
search at Google | bid on it at eBay

Found one matching entry!