The
strap is new and original Casio, dedicated for this model. I have repaced the strap loop with a non casio one.
It seems that Ayrton Senna had been wearing this model during his first two years in F1 (84-85)
Check out the forum ''watchuseek'', and search for the thread ''which is that watch on ayrton senna wrist''
ans also the website ''liquid crystal'' and search for ''Casio ts-1000''
Ebay wont let me add the links...