I have operated a 30 ton Austrian 0-6-2T for over 30 years and will be heading to the C&TS in Chama, NM later next year and would like to get some protective arm sleeves. I usually see them in old photos of locomotive crews. The only ones I see on the internet are Kevlar, which wasn't invented back in the day. Any idea what they would have been made out of and how they were constructed so I could make a set. The ones I see look like they would go over the shirt sleeves or cover your arms if you had a short sleeve shirt on. Did they have a thumb hole to help them stay on. Any help on making a historically accurate set or buying them would be appreciated. Thank You. Tom.