I'm in the process of going thru my recently deceased brothers things. Among the stuff there is an Eicar watch that is very similar to the one in the link below, the difference being that the rays are divided into 4 sections rather than covering the whole face. It is working, but is it something that would be worth investing in cleaning and repair or just keep for sentimental value? I've searched the internet and haven't found this exact watch.

https://www.ebay.com/itm/223581008702