Clearly this isn't "new" if I reversed engineered it from an existing fabric. But I just worked this one out for someone on Rav who linked to a sweater and wanted to know how recreate the stitch pattern (I also happen to enjoy challenges as this). I thought I would share here as it's a rather pretty and simple stitch. Also it looks attractive on both sides.
This is a 3 color, 3 stitch, 9 row repeat
Use 3 color and work a different color each row. Trail the yarn instead of cutting if working in the round
the stitch repeat is 3 stitches and 3 rows. but each set of 3 rows shifts 1 stitch so it takes 9 rows to complete.
this is the pattern written for working in the round
Cast on in multiples of 3
CO in multiples of 3
1. s1wyif, p, k
2. k, k, p
3. p, k, k
4. k, s1wyif, p
5. p, k, k
6. k, p, k ,
7. p, k, s1wyif
8. k, p, k
9. k. k. p
If you are working flat this is the written pattern
1. s1wyif, p, k
2. p, k, k
3. p, k, k
4. k, s1wyib, p
5. p, k, k
6. p, k, p
7. p, k, s1wyif
8. p, k, p
9. k. k. p
Here is a chart. I didn't number the rows and you can use it for flat or in the round. Bold is the pattern repeat. I wrote the slip stitch as keeping the yarn on the right side of the fabric in case anyone uses this for flat work. Keeps it from getting over complicated.