How to identify the version of "make"?

I have this /bin/make:
-rwxrwxr-x 1 root root 43538 Dec 05 1994 make
It’s cksum is:
2469381720 43538 make
It depends on /usr/include/make/ file.

I need this older “make” because I have to maintain some our very old
project, where "makefile"s are incompatible with what “make v3.80” expects.

Somewhere in the docs I’ve seen “dmake” and “qmake” mentioned. Is mine one
of them?

I’d like to have both older and v3.80 installed and usable. Apart from
renaming the older into [d|q]make what else should I do to it’s