Egnell developed the world's first hospital grade breast pump in the mid-1950's. This Egnell Model 50 breast pump was used widely in the U.S. maternity wards as it is a very reliable, strong, and durable machine.
This breast pump has a piston and cylinder mechanism for generating suction. The suction level can be adjusted, depending on the need.
After I purchased this particular machine on the second-hand market, I had it sent to a mechanic who tested, recalibrated (for maximum suctioning), and replaced the suction tube. The clear cover keeps the mechanics dust-free which are shiny (per photos) and in wonderful condition for this older, but well-functioning machine. I have kept this machine for the last 20 years, but it was not being used during this time.
My own experience with this machine - I was given this model of breast pump to use during my newborn's 2-week stay in the NICU. As my newborn was a preemie and unable to breastfeed, I needed a reliable breast pump to use around the clock. After we left the hospital, I found that the newer model "hospital grade" breast pump I purchased was not strong enough to extract the same amount of milk, plus took way longer to extract less milk. That is when I decided I need to hunt down this Egnell SMB Model 50 breast pump, the same as I had used in the hospital, for long-term home use.
You can find similar stories on the internet, about women who relied mostly on pumping, for preemie's or otherwise, and owed their breast pumping success to this particular model.
Power cord included.
*For comparison - current newer model of Ameda brand (formerly Egnell) Platinum electric breast pump retails for $2,310!