While I am not sure if exported versions of this product/model differ, the short answer is yes they are all adjustable. However, you can have them pre-set (but still adjustable) at a desired weight if you order one directly from Timney .
I have the same trigger (blued version....I believe yours is in nickel as designated by the -16 suffix) in a recent production Model 70 SuperGrade that came with a factory MOA trigger. I haven't tested the full range, but they can generally be adjusted anywhere from around 1.5 to 4 lbs. I set mine at about 2 1/4.
The recommended answer is call or email Timney.