|More about the experiences I've had tailoring vintage Lee & Levi's jeans.
When I'm altering vintage jeans, matching the thread color and thickness is of the essence to make the alteration as invisible as possible. I have scoured the 'net and all my local fabric stores in search of the perfect thread for the various jobs.
Below are the best thread that I've found for alterations on old Lee & Levi's jeans hands down. Thought I'd pass along the information to anyone that may be thinking of taking in jeans, but not sure how to go about it or where to begin.
M782 - Older Levi's and Lee Jeans (not as thick as topstitching)
850 - Lee Jeans (topstitching thick)
502 - Older Lee Jeans (used doubled up [2 threads, 1 needle])
870 - Similar to Coats Jeans thread, but has more luster. (topstitching thick)
525 & 506 Levi's white jeans (topstitching thick)
Coats & Clark
Extra Strong Thread for Jeans. This is the real deal, I just wish they'd put more than 70 yards on a spool.
157A/T29, 83F/T2, 83F/T29 - work well for zigzag or serged edges inside of jeans
Also, after taking in a nice faded pair of jeans, you may have to sacrifice some of that nice rippled fade at the cuff or inseam. Have no fear, I've had success using brush tip fabric dye markers to add in a denim fade around the top stitching. I've found that the light grey fabric markers are best, the blue or denim colored markers are far too jewel toned when applied to old denim. It just doesn't look right.