Thank you, Pete.
Searching the web using the data on the casing gives very few results. None containing that 555 number, I don't know what it stands for and whether it is relevant to the model. All I found is the one with 551 marking.
What kind of a relay do you think could have these ratings but of different mounting? Maybe that would give more search results. If there is an equivalet of a different design, or so. The PCB has holes for those narrower, vertical (and sometimes transparent) relays, maybe there is one that could be used instead of the original one? I checked with local electronics stores, they have never seen the model from the picture.
Thanks so much.
