I voted #4. All I heard was hissssssssssssssssssssssss. Maybe there was some reverb in the background. Hard to tell. Maybe it was the sea. Dunno.
There's no point comparing (spring) reverbs if the mix is at 1 or 2. All reverbs sound the same then.
Spring is for surf, drip, splash, so, please, make it wet, let it rip and play surf...
1. Here I was monkeying around with an AA Audio APE-5. Normal setting, no modulation. I think it's the same as the APE-3 that Tom has in his line, but that one has a different enclosure.
2. This was indeed the spring reverb, Tube Town. Short tank, 3 spring. The tone was even lower than in the photo, because otherwise it would have been much brighter than the other two and a dead giveaway. Other controls maxxed.
3. Donner Echo Square, digital mode. Later considered that the modulation mode might have been better, and maybe lower the feedback. I really like this unit, reminds me of the Realistic Reverb, which was my first reverb.
I wanted to make excuses for why my guess about number 2 might be wrong, like I was listening to it on my low quality chromebook with very low output speakers put right up to ear, but that would've been making excuses. But, I did guess number 2 using my low quality $99 chromebook with very low output speakers put right up to my ear. I used my right ear because I have more hearing loss in my left.
And I still got it right.
Because most digital effects still sound like trash even with all the "advances". At least, that's what I get to claim while I pat myself on the back for getting it right. That said, I own a digital reverb, a Meris M7 and it is pretty good, mostly for clean tone reverb but I still have more exploring to do.