Nope. I'd use that to mount a spirit level ... the second most important thing the 67 does not have...
Note that the keyrings also come in glow-in-the-dark versions if you are fond of lighting up in dim light.
When I shot my Rollei a lot it was not a problem, film wasn't in long enough for me to forget what it was and the Gossen was always set to the right ISO. Now that I'm older, shooting a Blad with a couple of backs, and film rolls don't come in a box anymore, it is more of a problem. Worse with 4x5, just the other night I ran a couple of sheets of E6 threw some Xtol. I think I need to hire a lovely assistant to help me solve the problem but the wife says its not gonna happen.
I use Analogger app.
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I forget all the time what film is in my C330, or whether the camera is loaded at all :blink:
You can at least tell if it's loaded by looking at the counter! I also leave one of the spool knobs poking out when there's no film in it.