Please Help: 348 tb or 348 GTB?

After nearly a decade, it has finally been discovered and ultimately settled that a certain RHD green 348 is a berlinetta - and not a ts as it has been misidentified over the years. It has also been (mis)identified as black, and as a Challenge car, but we'll get to that in a minute.

First, I need some help in determining how to tell the difference between a tb and a GTB. It's my understanding that GTBs were only made in '93. Is this correct? This car was built in late '92. It wears a GTB badge on the rear deck lid lip, but we all know that someone could've just slapped that on their at some point. But the front lip and the side skirts are body-colored, which is consistent with a GTB, whereas the front lip and side skirts of a tb would be a satin matte black. It has been pointed out to me that the back piece of the rear deck lid (the piece closest to the rear window) is black, whereas the rear deck lids on GTBs are one solid color. This further adds to the confusion of this car's true model type. Are there other details, to which I'm not privy, that provide a clear indication of whether this car is a tb or a GTB?

Moving on, this car has been (mid)identified in the past as black. Clearly, here, it's green. I know in some pictures it looks blue - but I promise, it's green. Now can anyone identify the exact shade of green? Assuming this is an in-range factory color, Ferrari was using Glasurit in the early '90s. Can anyone discern the exact shade of green used here?

Lastly, some people have identified this car as a Challenge car. How can I prove, or disprove, that this car is a Challenge car, or not a Challenge car? I lament that I don't know enough about 348s; but this is a prime example of how I can learn, and an opportunity to learn from true 348 experts. So any advice and assistance that you folks could provide would be greatly appreciated. Thank you.
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Hi, David - yes, I have a picture of the VIN! I wasn't aware the VIN would dictate the difference between a tb and a GTB. Thank you!
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Unfortunately a photo of the engine was not taken. The car is in Ireland, and it took a fortnight for my spotter to go back and just get a picture of the VIN. If he can go back again, I don't even know if a picture of the engine is feasible.

David 84 asserts that a picture of the VIN dictates whether the car is a tb or a GTB. The picture I posted above clearly shows the VIN as ZFFKA35B0000. Assuming David is correct, then that is ample confirmation that this is a tb that's been aesthetically modified to look like a GTB.

Assuming that the VIN confirmation is irrefutable, then I'm hoping we can move on to the two remaining questions about this car: whether or not it's a Challenge car, and how to determine whether or not it's a Challenge car, and; the proper and correct name of the car's paint color.

 

Because the kits were interchangeable back then, I understand it makes it more difficult to determine if a car was or was not a Challenge car. Is there any way to tell, just via pictures, whether or not a car was ever a fully kitted Challenge car? Or, without Ferrari documentation, will this car's possible Challenge association always be questionable?

 

So it's definitely a tb, with the possibility of being a Challenge car?