I have four. I've had more, and sold many more, but have kept just 4...

#1 - a blue cedar Vac 51 with a sterling cap. My first 51, and the first vacumatic filler I restored. I've had it for about 30 years now.
#2 - a Navy blue aerometric with a gold filled cap. It has the name E M Hare on it - the deceased husband of our neighbor across the street. Ruth wanted me to have it. She was a good neighbor, and I keep it as a reminder...
#3 - a gray English made Vac, lustraloy cap, given to me by our Pastor in Syracuse. Ken is a great guy, and had quite an influence in my life.
#4 - a Forest Green aerometric, with a lined silver cap. I think someone removed the gold... its still in the stamping. The cap is all wrong, but I like it. I've had and sold the green 51s 4 or 5 times. I decided to buy one more, and keep it, just because I like them.