Hello, this is a specific version of an AICA member alphabet, which is typically referred to as “Round Serif”, and has been given numbers based on Zapf Chancery–though at least the numeral ‘1’ has been modified. There are quite a few versions of the font available, including one in Cochran’s Monumental Designer, and one in Monu-Cad, but both are a bit more clumsy looking and neither will match this version.
Claustrum, as well as Round Serif, are both based on lettering from a 1956 book called Script Lettering, by M. Meijer. His version was titled “Gothic Text”, and contained no numbers, which is why there are so many different variations of them. Meijer may also have used older source material when creating the style.
Claustrum will be similar to the lettering, and Zapf Chancery can be used for the numbers with some light modification.
If you would like help matching it, feel free to use the MLC Inscription Matching Service.