The top photo below is the remnants of the sticker that was on the evaporator box of my 1970.
The second photo is a reproduction for sale on eBay.
In the lower right corner, I can read "SAE-AIR-60" which matches the reproduction.
But I can't read what was in the lower left corner. Is "EBA-70-70B" on the repro "correct"?
Repros with different years are available.
And what do these characters mean?
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AC System Update:
You can probably tell from my other threads that I'm up to my eyeballs restoring the AC system. The inside half of the evaporator box is removed, along with all other under hood components. The vacuum system and controls work, and the doors seem to move like they should. The seal along the blend door which is visible with the evaporator removed looks remarkably good. So I don't think I need to tear into the box under the dash. My plan right now:
- Compressor: Probably original so decided to have Dom restore it.
- Condenser: Probably original, and "worked when parked" 28 years ago, and kept sealed since. I had it flushed and pressure checked and intend to reuse it.
- Evaporator: It also worked when parked and was going to use it. But the guys at Carr's Corvette said it's hard to flush them out because of their "parallel design". They also touted that new evaporators are more efficient. So I'm leaning towards replacing it with new.
- POA: Again, worked when parked. But they are notorious for acting up, so I'm leaning towards finding an NOS. Carr's Corvette, Old Air Products, and Vintage Air all recommend a POA replacement kit which cycles the compressor on/off. Even though that's less expensive than an NOS POA, I hesitant to have my original A6 cycling. Is the clutch designed to do that? Plus it won't look original.
- Expansion Valve: I can get a new replacement for under $50, or spend several hundred on NOS, if I can find one, or clean mine up and test it. To be safe and look original, I'm leaning towards NOS.
- Manifold, hoses, drier: All new. Probably not exactly like the original (crimps, drier top, etc.) but close.
I have a small inventory of R12, so I plan to use it. I hear it's more efficient than R134 too, but worry about the impact to the ozone layer.

The second photo is a reproduction for sale on eBay.
In the lower right corner, I can read "SAE-AIR-60" which matches the reproduction.
But I can't read what was in the lower left corner. Is "EBA-70-70B" on the repro "correct"?

Repros with different years are available.
And what do these characters mean?

===============
AC System Update:
You can probably tell from my other threads that I'm up to my eyeballs restoring the AC system. The inside half of the evaporator box is removed, along with all other under hood components. The vacuum system and controls work, and the doors seem to move like they should. The seal along the blend door which is visible with the evaporator removed looks remarkably good. So I don't think I need to tear into the box under the dash. My plan right now:
- Compressor: Probably original so decided to have Dom restore it.
- Condenser: Probably original, and "worked when parked" 28 years ago, and kept sealed since. I had it flushed and pressure checked and intend to reuse it.
- Evaporator: It also worked when parked and was going to use it. But the guys at Carr's Corvette said it's hard to flush them out because of their "parallel design". They also touted that new evaporators are more efficient. So I'm leaning towards replacing it with new.
- POA: Again, worked when parked. But they are notorious for acting up, so I'm leaning towards finding an NOS. Carr's Corvette, Old Air Products, and Vintage Air all recommend a POA replacement kit which cycles the compressor on/off. Even though that's less expensive than an NOS POA, I hesitant to have my original A6 cycling. Is the clutch designed to do that? Plus it won't look original.
- Expansion Valve: I can get a new replacement for under $50, or spend several hundred on NOS, if I can find one, or clean mine up and test it. To be safe and look original, I'm leaning towards NOS.
- Manifold, hoses, drier: All new. Probably not exactly like the original (crimps, drier top, etc.) but close.
I have a small inventory of R12, so I plan to use it. I hear it's more efficient than R134 too, but worry about the impact to the ozone layer.

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