BAUMANOMETER 300 Littman 3M Stethoscope Vintage clean functional Blood Pressure

Description

For Photo 2, I had pumped it up to 180 and was letting it out for Photo 3.
It appears that this model was made from 1935 to 1960.  My sleeve has registered trademark logos, so it has to be post 1946.
The rubber bulb is beginning to crack at the ends, especially where it meets the chrome dial (PHOTO 9)
The Littman 3M is made in USA and has grey rubber everywhere except the ear pieces. See photos AND LAST PHOTO FOR MEMBRANE.
Sphygmomanometer
THIS IS VINTAGE. I CLOSED IT OFF AND PUMPED IT UP AND THEN LET THE AIR OUT SLOWLY. IT ALL WORKS AS FAR AS THE TECHNICAL ACTIONS. I HAVE NO IDEA IF IT IS ACCURATE BECAUSE I DON'T EVEN KNOW HOW TO READ ONE. THE LITTMAN 3M STETHOSCOPE MAKES A LOUD NOISE IF I TAP THE MEMBRANE AND I CAN HEAR AN ABDOMEN JUST FINE BUT APPARENTLY I CAN'T HEAR MY HEART BEAT. THAT MAY BE MY LACK OF TRAINING OR SOMETHING ELSE. THE BOX HAS LIGHT EXTERIOR SOILING BUT IS IN NICE OVERALL CONDITION WITH A FUNCTIONAL BUTTON. THE BULB GETS HOOKED INTO THE BOX SO IT DOESN'T BUMP AROUND. THE RUBBER BULB IS BEGINNING TO CRACK WHERE IT JOINS THE CHROME ADJUSTMENT DIAL. I ASSUME THIS IS FROM THE 1950'S AND I ASSUME THAT IT IS FOR COLLECTING PURPOSES BECAUSE I WOULD OTHERWISE USE AN ELECTRONIC ONE.
PLEASE USE ZOOM FUNCTION TO INSPECT ALL PHOTOS
If you live on the west coast, Priority Box A will work and I will refund the difference, if there is one.
oak