the 686 was introduced with Goncalo Alves target grips and the Hogues didn't come along until the -4 model in 1993. My "no dash" from 1983 has the wood target grips.
You're right. The gun in question is a no-dash and the early guns came with Target Grips. I bought one of the later ones and it came with the Hogues. I replaced them with some nice Ahrends grips.