Michigan Central Railroad or Maine Central Railroad? The two stamps below come from a calendar of stamps that was once in the collection of Henry Tolman. That calendar is replete with stamps from the midwestern properties of the Vanderbilts, in particular the Lake Shore & Michigan Southern Railway. There are numerous M. C. R. R. cancels from the Michigan Central, also a Vanderbilt property. In both cases below the cancels are of a small font, both serif and sans serif.
The Maine Central, which also used M. C. R. R. cancels, used a much larger font, at least in the example of the bill of lading below. I seek more examples of MCRR cancels if you have different types. Please contact me or send scans to firstname.lastname@example.org. Thanks!