There are no lights on the market that will work for the vintage ornaments without some adjustment.
The little green bottom cap on your vintage ornament pigtail must be removed and exchanged with the similar bottom cap from a light bulb from the light strand.
To remove the caps, just use a butter knife to bend back the 2 metal prongs.
Limit 3 Magic ornaments per light strand.
Spare bulbs and fuse included.