I am looking for a free font that has similar fat numerals as those used for indicating the time signature in (Western) sheet music. For sure, specific sheet music fonts do exist, but these typically do not offer the possibility to use the numerals separately.
Here are some specimen of what I am looking for:
Notice how the 4 is fat; not only at the vertical stem but also on the slope. A font like Georgia does not exhibit that dual fatiness on the 4. Pettingill CF comes in the neighbourhood, but there is still much room for a far better match. The Font Squirrel Font Identifier came up with Country Western Black, based on the 3 and 4. That non-free font also has some resemblance; especially for the 7.
Speaking of which, here are the very rare 5 and 7: