I found these two images on Ebay. According to photocaption they are 12 cm Granatwerfer 42.
Does anyone know how to distinguish between the original 12 cm Granatwerfer 378(r) and the 12cm Granatwerfer 42?

Any additional wartime images of the 12 cm Granatwerfer 42 german mortar will be welcome.
Regards Sturm78