Part of the Week: Fichtel & Sachs Indicator Toggle Chain

The week's part of the week is really the part that got me started with this small part nonsense. The Fichtel & Sachs indicator (toggle) chains are hard to come by in the US, but there are a lot of the Sachs hubs floating out there that need them during restoration projects. As far as I know, they come in three lengths:

1 short one for the traditional 3 speed torpedo hubs
1 medium one for the 3x7 hubs
1 long one that is specific for the pentastport (5 speed hubs - and I believe it additionally uses a short one, as the 5 speed hubs use two chains)

If you have any info on this, let me know! Below is the photo of the short Sachs indicator chain.