Unknown SOPA(?) Item

[akirkby]

Hi,

 

I recently purchased a number of items second hand. All three of them appear to be from the same manufacturer due to the labelling & packaging being similar. The items I can identify are from SOPA, but very old, around 30 years according to the current SOPA company - http://www.mbapiro.ch

 

All three of the items have part numbers on which appear to translate to a modern day part code -

1. Three buffer stops - has the number 8306 stamped on the back, whilst the current description is - Art. Nr. 830 600 Prellbock Beton (H0m).
   Also has the manufacturer on the back -
   SOPA
   R.Solca und U.Panzini
   Postfach 79
   CH-4105 Biel-Benken
2. A cast resin tunnel portal 8391, current description - Art. Nr. 839 108 Albula - Tunnel, Nordportal, mit Vordach und Toren Bausatz
3. I have a second tunnel portal with the number 8375, however, I cannot find anything similar in the new product range.

My guess is that at some time in the past the product numbering has been changed - would anyone have any ideas as to which tunnel portal this model is based on?

 

The white label is my own catalogue number - nothing to do with the manufacturer!