Thanks to Luker I have another clue. I took up some of that green with the fastening end of an x-acto blade and we're looking at Reynolds 531. Under the green is primer and under the primer is what looks to be the factory paint in metallic black. I was tentative with the scraping but at first glance the chain and seat stays aren't entirely chromed.

I'll look in to the serial numbers re. Romic. It ends in 88. Looks like a year mark to me.