Vintage GE Red and Green C7 Incandescent Christmas Bulbs

Here is a pair of vintage C7 Christmas bulbs that came in some older electric Christmas candles I picked up from an antique store earlier today. I only bought the candles for the bulbs! These are the first vintage C7s I have ever seen, so I had to have them! They are both GE bulbs, featuring their logo towards the bottom of each lamp, which I like. There is a red one and a green one. Unfortunately, the red one is dead, only the green works. If anyone can tell me how old these are, that would be appreciated!