Help ID'ing some slotted tube bodied SS turnbuckles

[Kalu 1957]

Hello All, Please do give this a read!?? I am trying to ID who the Mfg of some turnbuckles may be....They appear to be Stainless Steel tube bodied (8 3/4") with 2 opposing lengthwise slots of some 5 inches centered along the barrel. The threaded cross section is 5/8" diameter and both ends are toggled and pinned also 5/8"...the toggles are stamped with a small sloop rigged sailboat that looks like the sail is stamped perhaps with an "s"(I am talking really tiny!) I am hoping that with the manufacturer ID'ed; I may be able to find out strengths(working loads/breaking loads) on these because they are in super shape (right outta an unmarked box)and we would like to use these....Oh yeah they also have an interesting option to cotter pins in that there are two wound metal wire "pins" that roll around the exterior of the tube body 3 times and then take a 90 degree turn, cross the three wraps and then taking another 90 degree turn and enter the slot to enable you to pin the threaded rod where ever you will. A second question is that all of these DO appear as if they are stainless steel but the the fitting the threaded rod goes into to support the toggle appears to be bronze....Is that common? I haven't noticed it often and would that be a major weak point?? Many thanks!

[Bob Pingel]

Those are Johnson turnbuckles, you can get all the details on their website.

Bob Pingel