Midnight/Princess globe question

[foghorn]

Bought a princess lamp off of ebay to match my existing one and it came with a screw top cap. What is with that? All the info I can find on the site deals with the crimp on cap. Just curious if anyone has any input on this. The lamp doesn't flow well, guess this will make it easier to tune up.

[Modulo '70]

Very true, nothing wrong with a screw cap as it is better for refills etc..