First, naming of parts - Traditionally we had brake blocks and shoes . It's only recently any other terms (pads, holders etc.) have come into use.
Old brake blocks - as mentioned in connection with Resilion, there must be question about the quality of 'new' but very old stock. A friendly bike shop gave me a whole box of red Fibrax blocks - they'd been on a shelf for years, because practically nobody (except me) puts new blocks into existing brake shoes. I assumed these were intended for ali rims (like red Weinmann blocks), but they seemed to have hardened with age so that they damaged the rims without much stopping effect.
Riding old bikes inevitably involves the potential hazard of things just breaking under you (I've had a couple of lucky escapes) , so it seems sensible to do the best you can when dealing with braking. Therefore I think it's best not to worry too much about originality when it comes to brake blocks. The callipers are noticeable, the blocks and shoes much less so - I use the best shoes and blocks I can find, and I've not yet come across shoes that won't fit my Weinmann or GB callipers.
Yes I second that.
I bought these a couple of years ago and used them on alloy rims.
They didn't work, they seem to just heat up and melt and then disintegrate. I could actually smell the burning rubber while riding along.
Braking
First, naming of parts - Traditionally we had brake blocks and shoes . It's only recently any other terms (pads, holders etc.) have come into use.
Old brake blocks - as mentioned in connection with Resilion, there must be question about the quality of 'new' but very old stock. A friendly bike shop gave me a whole box of red Fibrax blocks - they'd been on a shelf for years, because practically nobody (except me) puts new blocks into existing brake shoes. I assumed these were intended for ali rims (like red Weinmann blocks), but they seemed to have hardened with age so that they damaged the rims without much stopping effect.
Riding old bikes inevitably involves the potential hazard of things just breaking under you (I've had a couple of lucky escapes) , so it seems sensible to do the best you can when dealing with braking. Therefore I think it's best not to worry too much about originality when it comes to brake blocks. The callipers are noticeable, the blocks and shoes much less so - I use the best shoes and blocks I can find, and I've not yet come across shoes that won't fit my Weinmann or GB callipers.