Maybe nothing special. But damn, back in those days the packaging was a lot more different. Now those kits are just packaged in a little plastic, or the expensive ones in a plastic box, really cheap. But these ones, in a sturdy metal/tin box. Nicely with an manual, glue, rubber stickers and everything and it’s design is pretty cool.
It’s like somebody put the content in the box. That is just the charm of it.