Looks like a "personalised" version of the good ol' Copperplate Heavy.
The boldness was determined by how the signman wanted it to fit. We did most of our layouts on the wall also...seldom used patterns.
The guy that did that job probably pulled the letter style from memory. Most likely did not even have a scaled grid drawing and only used a straight edge and chalk to lay it out. Notice how well everything fits and is placed in concert with the space allowed despite the centrally located column section of brick.not even by pounce or something applicablez??
I agree, lots of signs/walls got lettered with nothing more than some chalk and straight lines, along with a ruler/straight edge. You would figure out the line length, look at the text that had to fit and do the "math" to come up with the right letter sizes and spacing.
A pounce pattern or scaled sketch was also a common option (especially for me).
Colin, just out of curiosity.....where is that photo from? Is it in your local area?