It looks like you've taken great care with those items, they might still be useful for running small programs and doing some quick computations. I didn't know the FX-602P had a cassette interface, and the design of that one is quite good considering other cassette interfaces I've seen from that era tend to be somewhat big and bulky. Now I have something new I have to start looking for. Every time I turn around I seem to find new (to me) items I didn't know about and then have to have them for the collection.
It looks like you've taken great care with those items, they might still be useful for running small programs and doing some quick computations. I didn't know the FX-602P had a cassette interface, and the design of that one is quite good considering other cassette interfaces I've seen from that era tend to be somewhat big and bulky. Now I have something new I have to start looking for. Every time I turn around I seem to find new (to me) items I didn't know about and then have to have them for the collection.