These are C-6, not C-7. In other words, a modern C-7 bubble light will not substitute in the original socket. As far as I know, these were manufactured in the late 1940's, probably 1947-48. NOMA Bubble Lites are becoming quite rare, especially in the original package with the cherub on the inside cover. The item "Vintage Box of NOMA 9 Biscuit Bubble Lights.
C-6 Original, All Working, 1947,1948" is in sale since Tuesday, November 9, 2021. This item is in the category "Collectibles\Holiday & Seasonal\Lights". The seller is "epsilon_publishing" and is located in Olpe, Kansas. This item can be shipped worldwide.