Rare vintage LED - round low profile

They are standard brightness red LEDs with a flat body and no dome, but I don't have any specs on them.

These are only standard brightness LEDs, but are a very unusual and rare LED, get a piece of LED history with these!

Note: brightness will vary from typical standard brightness, down to quite dim. Also, leads may not be straight and may have a few small bends. However, all LEDs are new old stock and true original vintage LEDs and have been tested to work.