I have no idea about SEAT part numbering mate sorry. Ask me about the VW system and I can tell you as their numbers are logical. I don't know for sure what immo generation your Altea even has.
Regardless, Ed could reprogram any you buy as he has the genuine interface? May be worth (if you pass him) having your car scanned so he can save your data in case you find a set to post to him, means you don't do without your clocks in that instance.
Before you impulse buy, the clocks all look the same but yours should have a different plug at the back with it being a white display.
Ebay 360679171821 is the red display.
Ebay 360679173957 is the white display with blue plug.
I also found that Leon clocks are the same (I have them) but the time adjuster nipple is different so needed swapped over, otherwise they were physically identical.