Kodachromeguy is exactly correct. The Luna Pro SBC and Luna Pro F are identical in size and weight. The only real difference is the colors on the dial and the addition of a jack to connect the Luna Pro F to a strobe
Both of you are correct, my mistake.
The Luna Pro and Luna Pro F are two completely different meters!
The old Luna Pro uses a button battery, and is easily hacked with a diode for use with SR 44 batteries.
It is without flash function, and fits easily in a dress shirt pocket.
The Luna Pro F uses a 9 volt battery, can read flash, (F for Flash) but mine does no have a sync port.
It's large, at least 2.5 x the mass of the older meter, has a separate button for a battery check and comes in a heavy leather case.
Both can use the darkroom meter adapter, the 7/15° 'spot' adapter, and others originally were made for the Luna Pro, old style.
Both have screws that allow the user to tune the meter.
I hope this clears things up some, or at the least, inspires googling.
Thanks to all for giving the correct information, to my wrong reply post
Be Safe, Be Happy and Godspeed to all here and your Loved Ones.