I have the following stamp which I am assuming is a precancel but cannot match it to any of the types listed (standard, bureau or local). I have a fair number of other types for Milwaukee and the font spacing doesn't match. Its close to L-5, L-6 or L-7 but this has a comma. It is a 1911 Perf 12, which according to PSS catalog limits it to type 512, or L-5 TS but it doesn't match either of those. I could be a post cancel as well but not sure.