There's a Mercier thread running currently with a couple of what seem to be Mercier 300s.
But identifying model and year is not so easy. This is a link to my attempt at identification.
http://www.bikeforums.net/showthread...-Mercier-build
Also a help in distinguishing between models 100, 200, 300, etc ... have a look at this blog and scroll down to one of the comments. (I'll quote here..)
http://retrobikerestorations.blogspo...6/mercier.html
I have one too, and I think it's a 200 but it could also be a 100 - I'm not sure. I know it's not a 300 Reynolds. Here is a list of equipment for each model I found online - I believe they were imported 1969-1972? -Chris
"I have a Mercier catalog from Beacon Cycle and Supply Co. (early to mid '70s) which lists the following spec's for each of their models:
Model 300:
Reynolds 531 double butted frame, front and rear forks.
Chromium plated front fork ends.
Simplex Criterieum front and rear gear changers.
Simplex frame mount shift controls.
Normandy Competition Dural QR large flange hubs
Stronglight headset.
Stronglight professional crank set and chainwheel 46 x 52 (picture looks like a Stronglight 93).
Simplex cable clips.
Dural pedals with reflectors.
Chrome seat post.
MAFAC brakes with hooded levers and adjusters.
Atom 66 competition freewheel 14 x 24.
Sedis chain.
Mavic Monthlery alloy rims.
Chromed straight gauge spokes.
Hutchinson tubular sew-up racing tires.
Ideale 2000 molded saddle.
Dural handlebar.
Dural AMC handlebar stem.
Tornade Dural ringed pump with AFA express connector.
Brazed-on pump clips.
Toe clips and straps.
Approximate Weight: 22 lbs.
Colors: Orange, Red, Sky Blue, White, Yellow, Kelly Green, and Purple
Frame Sizes: 19 1/2", 21", 23", 25"
Model 200:
Luxtub tubing - frame, front and rear forks.
Chromium plated front fork ends.
Simplex Prestige front and rear gear changers and frame mount shift controls.
Normandy Dural QR large flange hubs
Precision fork ends.
3 pin steel chainwheel 46 x 52.
Brazed-on cable clips.
Steel rattrap pedals with reflectors.
MAFAC brakes with hooded levers and adjusters.
Normandy freewheel 14 x 24.
Sedis chain.
Mavic Sport alloy rims.
Butted rustless spokes.
Hutchinson sew-up tubular racing tires.
Molded vinyl covered saddle.
Dural handlebar stem.
Dural handlebar.
Tornade Dural ringed pump with AFA express connector.
Brazed-on pump clips.
Toe clips and straps.
Cloth handlebar tape.
Special hand striping.
Approximate Weight: 25 lbs.
Colors: Orange, Red, Sky Blue, White, Yellow, Kelly Green, and Purple
Frame Sizes: 19 1/2", 21", 23", 25"
Model 100 (and 111 Mixte):
Luxtub tubing - frame, front and rear forks.
Chromium plated front fork ends.
Simplex front and rear gear changers.
Simplex frame mounted shift controls.
Normandy Dural QR large flange hubs
3 pin steel chainwheel 40 x 52.
Brazed-on cable clips.
Rattrap steel pedals with reflectors.
MAFAC brakes with hooded levers and adjusters.
Normandy freewheel 14 x 28.
Sedis chain.
Rigida steel rims, serrated edges.
Butted rustless spokes.
Hutchinson high pressure gumwall tires.
Molded vinyl saddle.
Steel handlebar.
Dural handlebar stem.
Tornade Dural ringed pump.
Brazed-on pump clips.
Black handlebar tape.
Special hand striping.
Approximate Weight: 25 lbs.
Colors: Orange, Red, Sky Blue, White, Yellow, Kelly Green, and Purple.
Frame Sizes: 19 1/2", 21", 23", 25" (20" and 22" for mixte)
Model 90 (and 91 Mixte):
Luxtub tubing - frame, front and rear forks.
Simplex front and rear gear changers.
Simplex frame mount shift controls.
Normandy large flange hubs with wingnuts.
3 pin steel chainwheel 40 x 52.
Rattrap steel pedals with reflectors.
LAM brakes with hooded levers and adjusters.
Normandy freewheel 14 x 28.
Sedis chain.
Rigida steel rims, serrated edges.
Butted rustless spokes.
Hutchinson high pressure gumwall tires.
Molded vinyl saddle.
Steel handlebar.
Dural handlebar stem.
Black handlebar tape.
Approximate Weight: 25 lbs.
Colors: Blue and Yellow
Frame Sizes: 19 1/2", 21", 23", 25" (20" and 22" for mixte)
Model 140 (and 141 Mixte -- both of these are children's 18" frame racers):
Luxtub tubing - frame, front and rear forks.
Chromium plated front fork ends.
Simplex Prestige front and rear gear changers.
Simplex frame mounted shift controls.
Normandy Dural QR large flange hubs
3 pin steel chainwheel 36 x 42.
Brazed-on cable clips.
Rattrap steel pedals with reflectors.
MAFAC brakes with hooded levers and adjusters.
Normandy freewheel 14 x 24.
Sedis chain.
Rigida steel rims, serrated edges.
Butted rustless spokes.
Hutchinson high pressure gumwall tires.
Molded vinyl saddle.
Steel handlebar.
Dural handlebar stem.
Tornade Dural ringed pump.
Brazed-on pump clips.
Black handlebar tape.
Special hand striping.
Approximate Weight: 25 lbs.
Colors: Red, Lime Green, and Sky Blue
Frame Sizes: 18" for both boys and mixte.
Hope this helps -- Merry Christmas!