The GRC T4-NYBW typewriter ribbon is made to fit a range of older typewriter models. From our research, it’s often used with the Sears Scholar model 161.53771 electric typewriter, and a lot of folks have had good luck using it as a replacement for their older machines.

Some people have found it to work well in their Sears Scholar, keeping things compatible and performing steadily. However, there was also feedback that it didn’t feed as smoothly as the original, especially when using the correction feature.

It's important to mention that a few people have run into fitting issues, especially with the Smith Corona Electra models. From what we gather, the ribbon might be too big or the notches might not line up properly on some typewriters.

This suggests it's not a one-size-fits-all solution and may require a bit of adapting, like re-spooling onto the original spools meant for your specific typewriter.

Although it's generally received positive reviews, some have mentioned that they received ribbons where the ink was dried out, which means you might end up with light or unusable ink.

So while this ribbon works for many, you should be aware of possible fit and ink quality issues before grabbing one, especially if you're working on stuff that requires top-notch ink quality, like crafts or archival projects.

If you have a Smith Corona typewriter, it might be wise to expect some adjustments to get this ribbon to work or to look into other ribbons that specify compatibility with your model.

Keeping these things in mind can help you make the right choice for your typewriter needs.