What kind of Stitch is this?

[Silverd]

Hello Helpful Folks

Can anyone help me identify this type of stitching?  What kind or type of sewing machine makes this stitch?    Image is from a vintage leather Doctor style bag or suit case that I'm remaking around the existing hardware.  It appears to me that the leather panels were stitched together using a unique machine...Possibly a post bed or???  Certainly some hand stitching seems to have been used but its not totally clear?     A lot of these cases were made and there was likely special machines used in the manufacturing process.   Anyone have information?   

Thank you in advance!

 

Silverd

 

[tsunkasapa]

I have heard it called "chain stitch". It is sometimes used to stitch dog/pet food sacks. Pull the right end and it just "unzips".

Edited July 20, 2021 by tsunkasapa

[zuludog]

Yes, I also know this as the chain stitch, but have only seen it used to sew sacks of bulk dry materials like grain, flour, sugar, or cement. Search Google for sack sewing or sack closing machines

I suspect it has been mostly replaced in making leather goods by the sewing machine lockstitch. Unless it's important I would saddle stitch by hand

If you contact some of the sack closing machine manufacturers they might be able to help you

 

[jimi]

Yes correct tsunkasapa, that is a chain stitch and looks like a double needle machine. This works with one thread only and a looper instead of a bobbin, in this case 2 threads and 2 loopers. The machine that comes to mind for this heavy duty work would be a Puritain stitcher. You have probably heard of them???

 

Edited July 20, 2021 by jimi

[Silverd]

I was hoping to minimize hand stitching to the finishing runs at each corner and the corner pads.  But hand stitching would make the best looking results.

 

Silverd

[tsunkasapa]

5 hours ago, jimi said:

You have probably heard of them???

No, but I have no interest in sewing machines. I hand stitch everything.

[fredk]

Could you get a similar thread pattern using the Auto-Awl? Maybe not just as its supposed to be used but by altering how you do the looping of the thread

[Handstitched]

15 hours ago, tsunkasapa said:

Pull the right end and it just "unzips".

Yep, the last time I saw a stitch like that was on a bag of chook food, except, I can never get the damn thing to do just that...'unzip' , I always cut the wrong end  

HS 

[Silverd]

My goal is to remake the case with fresh leather and secure stitching regardless of stitch style.  I'm not focused on stitching persay.  My original inquiry was to understand if a special sewing machine was used to make this case...the stitching is the only remaining tell.

Thank you

Silverd

[Rahere]

15 hours ago, fredk said:

Could you get a similar thread pattern using the Auto-Awl? Maybe not just as its supposed to be used but by altering how you do the looping of the thread

Use it with a crochet hook to chain the loops together. The last stitch is pulled right through the previous loop to lock the rest.