1930 circa BRASS ENCAPSULATED PEN. THE END IS NOT A SIMPLE PENCIL POINT. THE B

Description

1930 circa BRASS ENCAPSULATED PEN.
THE END IS NOT A SIMPLE PENCIL POINT.
THE BACK IS A HOLLOW TUBE LIKE A PEN.
I cannot tell if this is a ball point pen or a mechanical pencil for sure but it looks like pen.
There is a hollow tube in the center of the hollow threaded end of the bullet shaped black pen / pencil point.
I cannot turn the small pen point brass tip and don’t want to force it any more than thumb and finger pressure.
The hollow casing looks brass / copper and the rounded dia. End with circular ring ridges in it looks brass also.
There is a small hole in the center of the rounded end.
This indicates to me that this is a pen requiring air to get into the back end of the tiny hollow tube for ink to flow out when writing.
2 7/8” long
x
½”
dia.
USED:
Tip of brass round case looks smushed and is dirty in the crevasses.
This might have been a dig find with a metal detector 1973 – 2003.
All these 1920  - 1940 - 1980 year items and hardware and parts were found in my uncle's attic.