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I have an older version of this one too. I think the last time I needed to use it was nearly 2 years ago but it's always attached to my bike at the bottle cage mount in case. From what I remember of using it, it works fine. 100psi might be hard to reach but is probably doable. No hose so it's handy to use something as a backstop if you're a vigorous pumper.
This seems to be the current version of the one I've been using for the last 20 years.