It's not impossible to be pretty accurate. I hope somebody nails it and you can compare to these numbers. You can estimate the length of his face from the base of antler to the nose to be around 15-16". His points are straight, but still pretty long, especially the 2, 3, and 4.
I'm not trying to gift or be conservative, just accurate.
Beams: 51
first 4 tines roughly 16, 18.5, 18, and 19.5 (over 20 on the left)
the right has a 10.5 5th tine
the left has 3 crummy tines 1.5, 5, and 3
fair mass, 27" each side
39 on spread
Add them up.