Two rare miniature Christmas light strings from the 1960s - they take the old E5 bulbs that screw into the tiny sockets. This type of miniature Christmas bulb is no longer made and they are very hard to find. The last picture shows the same type bulbs as used in these strings (from one of my long ago listings).

Each white string is about 16 feet long and takes 30 bulbs. All bulbs need to be present for the lights to work, and one string is missing four bulbs. I tested the other string by switching the missing bulbs from the working string, and it lit up fine. So both strings work, but you'll need four more bulbs to use both. You'll have 56 working light bulbs between the two strings, but of course old bulbs may burn out at any time - I can't guarantee how long they'll last.