Maybe I'm not being clear enough; we all know that the machine is indeed the Wollensak 1515 (thanks for the photo, btw, never seen that unit). It's clearly labeled in the manual and on the spreadsheet.
What's not clear is: there are programs called WOLFullBand# Without any tape referenced. The question is: what tape is used on those programs? Not the machine, which is clear.
The Wollensak was tested in 4 stages. The first stage was the tube section alone to verify its effect on frequency and harmonics. This was how I learned to differentiate between the effects of the tape stock on other non-linearities and make it stable on the toughest machine first so that it could then work for the easier machines.
After the tube pre the tone dial was completed and then the "FullBand" programs, on PR-150, and the following programs were labeled as such. They were in separate sessions, and at the time the documentation "Fullband" was the most important distinguishing factor to me, as the dial makes all the difference in getting a full-range sound to tape.
The machines that do not designate the calibration or gain specifics do not require these specifics. This is extra-additional information added as notation for the machines that are used regularly for final mix, tracks, and mastering aka Revox, Studer, and Otari. The Sony, Lafayette, and Akai are designated by their stock and speed.
When programs are designated "a" and "b" versions, the "a" is the most standard setting for that program, and the "b" designates a slightly higher harmonic content for the same recording.
Something else that has been asked a few times; The levels stated for the Otari, Revox, and Studer are not requirements or recommendations for the level that you must send to Nebula, or the level that a wav should be normalized to. These are simply notation for what each series of recordings are. All of the programs in R2R are edited to work accurately as they are loaded. They all have a little extra overhead if you wish to increase the input for low levels. I recommend using settings based on sound, but it can be helpful to see the small variations in levels and ips speed. I've created a chart for my favorites on the Studer and Otari, but when the final updates are done I will go back and include everything at 96kHz:
Actually wollen is sampled at 96, for me, with akai, my workhorse for all type of guitar sounds, clean, distorted, crunch... These tame the highs from my amp in a very nice way, I don´t use an eq but a little locut since I´m using these nice tapes. One more thing, tapebooster+ is must.... Studer 15 0a is great for drums and bass, even for vocals. For mixdown revox atr 15-0b for a vintage sound or otari 30 atr 0b for a more modern sound.