Here is a nice early Seiko digital an M159-5028 from 1977! I found this one in the summer of 2019 at a local watch fair. It was running but looked a bit battered and had what I thought was de-lamination on the screen insert. I paid a whopping £20.00 for it (which is a bargain even in this state) Took it home and then realised the de-lamination was in fact a liquid stuck between the glass and the insert. I tried many things such as soaking in alcohol to compressed air but nothing would shift it. I attempted to remove the crystal but it broke so I put it in my failed pile and there is sat for 4 months until a chance conversation with a friend revealed that he could get a crystal for it ( I had tried and failed to find one)
When the glass turned up I decided to refinish all the case, polished the top and a tiny lip at the sides and brushed finish on everything else. Crystal just presses in so was easy work. Now I have another nice front pusher early digital Seiko to add to the collection.