I had one of these when they first came out. Believe they went for around $600 then (circa 1990s). They were T star but not Phase coated. Frankly, they were a bit underwhelming. While compact, light, and with a good FOV, the current Leupold 6x30 Yosemite el cheapo has better resolution. For boating the Zeiss would provide enough magnification, and for sheer ruggedness, I suspect the 6x42 would match the Zeiss 8x30 as the most bullet proof piece of optics out there in BF land.
I won't bore the readers about a Zeiss 8x30 IF that underwent extraordinary abuse with several owners and maintained its functionality.
John