...for asking this (and including such a horrible pun - HA!). I find myself looking at a sixth bike. Just the other day it seems I only had one. This vintage bug is quite infectious (anyone else with this problem).
Anyway, on to the question at hand. I've come across what looks like a vintage Mercier and will share the very little I know about it (plus a photo I got).
Brakes: Racer brand
Wheels: 27 in.
Other: rear rack (probably a Pletscher?)
Fork: chromed (rear dropout too)
Stem: looks like alloy
Handlebars: replaced? (note bar end shifters)
Frame: green, lugged, steel