With out much more detailed close up photos of the frame I would defiantly say its a TVT & not a LOOK TVT see the difference between the seat lugs in the two links below.
The way the seat stays are fitted to the seat lug is completely different between the two bikes. The Look version has the seat stays glued into the lug but the TVT has them bolted onto the seat lug.
NB I will be putting much more detailed photos of my entire bike collection (31 Bikes) on the web in the next couple of weeks.
The dropouts on the Look Version 1986 & 1987 had LOOK engraved on the rear Dropouts where as the TVT version has no engraving on them. (well my 3 don't)
Both frames had TVT embossed into both chain stays. If the seat lug & the head lugs have TVT engraved on them as well then it’s the HM version (20% stiffer) without the engraved lugs then it’s the HR standard version.
Re the frame numbering this is all I can find out about them at the moment.
“This frame's serial numbers are B53G06 and K6 on the other side. According to what that LOOK rep told you, this would have been the 6th frame ever produced on line G.
So it is a 53 cm frame production line G frame number 6 built in November 1986
the K = November is the month built and the 6 = the year 1986”
So your frame number says “B7 on one side and B57G75”
So yours appears to be a 57 cm frame built on production line G & was the 75th frame produced in February 87.
So if you do decide to fit decals then it’s the TVT HR version.
Just hope all of this is some help to you
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