old maramu chain


Hi, happy new year to all !!!Questions for old maramu owners. What size
is the metric(?) chain that was supplied from Amel? Original lenth
supplied? I do not see a manufacturer name or model number on the
windless or a number for chain size on the drum. I have cleaned up the
rust on the chain but do not know if 30 year old chain (if original)can
be trusted. Thanks,Ross1989 Maramu #261