This vintage Riviera Cannes twin-snorkel panorama scopic lens mask is the most amazing blast from the past. I remember in the original Gidget with Sandra Dee, she wore a mask and snorkel like this. 

I believe this is new old stock. It is in original box and shows no signs of use. It is missing one of the plugs that allows you to use the mask without snorkels. 

I have no idea of the integrity of the rubber or this mask. I think it’s mostly best for display. Although it does appear in very good condition especially for being about 65 years old !