Finally took the time to get out calliper and tape measure. Here are the results:
- Year 1979 / 1991 / 2013
- 1. Fret 1.5" / 1.52" / 1.51"
- 12. Fret 2.17" / 2.14" / 2.13"
- 1. Fret 0.83" / 0.84" / 0.88"
- 12. Fret 1.02" / 0.98" / 1.02"
- Scale 34.09" / 33.9" / 33.9"
- Neck-PU 6.61" / 6.73" / 5.98"
- Bridge-PU 2.8" / 2.4" / 2.2"
- Headst. 0.59" / 0.65" / 0.63"
- Body 1.14"/1.56" // 1.14"/1.6" // 1.22"/1.61"
- Middle 4.13" / 4.13" / 4.21"
- Weight 10.04lbs / 9.32lbs / 8.89lbs
Couldn´t get the format I had in word across here, I hope it´s not too confusing like this.
The ´79 (not a ´77, that was another bird I had - my mistake) and the ´91 are Gibsons, the 2013 is the Epi Classic.
First is neck width, then neck thickness. I was suprised to find the scale length on the ´79 significantly longer, I thought they were supposed to be the same.
Pickup placement was measured from the end of the scale to the middle of the pickup. They move all over the place...
Headstock thickness was taken next to the E-string tuner, body thickness at the upper bout up and behind the bridge, and behind the bridge where the strap pin is.
Just for the fun of it I also measured the width of the middle section at the bridge. I think the finish makes the difference here...
My ´79 is by far the most heavy of the bunch, the Epi the lightest.
Some of these things, like the neck´s dimensions, are hardly noticeable unless you play one bass after the other. Playing, say, the Epi one day and one of the Gibsons a couple of days later you wouldn´t go "oh, that feels totally different".
The pickup placement on the other hand certainly does play its part in the sound of the Birds. The ´79 with its series wiring and different pickups has a unique sound anyway, but as I said before, each of them is still distinctly a Thunderbird.
Picture´s not all that good, but there you go:
Link Removed