N / LR1 size battery (Abingdon-on-Thames OX14)

I have a small penlight without a battery. It looks like it takes an unusual size. My best guess from researching dimensions is an N or LR1 type. (I don't have an old battery from it to confirm.)
If anyone nearby has a spare one of these, even part used, it would be really helpful for me to check if it is the right size and that the penlight actually still works. Thanks!
Can you help with this request?
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