I don't have a tape measure handy, it is the regular size of a lighter -the other side of the lighter does not have a M on it-on the bottom of the lighter it states excellent automatic No10632194 ( I Ithink) my eye site is failing then to the other side it states Made in Japan.It also has 2 screws on the bottom one bigger than the other.Hope the info I have given you helped.I'm sure it would look great polished up & with flint.Thank you for your interest,
The most common problem with vintage lighters is the old flint corroding in the tube. I know how to fix it, so if someone wins this, and that is the problem, contact me. Not difficult to fix, if that's the only problem.