I don't even know what language this is (Spanish? Catalan?) but the pictures tell the story. Great restoration job on a great old bike. Very impressive.

Catalan https://translate.google.es/?hl=es&tab=wT#ca|en|

I don't understand this. just why does it make sense that the seatpost might be Gipiemme simply because the dropouts are Gipiemme?

Sorry to drag this thread back from the dead, but a G.P. marked seatpost is for sale here on BF which can positively be identified as a 3TTT Gran Prix post. It is only marked with the script G.P., which the seller astutely correlated to the model name.

So perhaps not Gipiemme after all.

Velobase 3TTT Gran Prix entry: https://velobase.com/ViewComponent.as...m=105&AbsPos=0

Photo of seatpost:

I have had quite a number of NOS seatposts of this type and they come in San Marco poly bags. They are not like either of the two 3TTT seatpost designs...

Like the one pictured below? This was equipped on a mid 70's Austro Daimler Inter10. It's got the same G.P. script logo.

I'm still not convinced that Dave Anderson had it wrong when he said this is a GP brand before it became GPM (otherwise known as Gipiemme)...San Marco does not mean Selle San Marco, and if Hilary says it is nothing like the two 3TTT post designs he's seen, I have to give that observation a lot of weight....he's seen much more of everything concerning bicycles than anyone else here.

Fair enough. I suppose some Italians have a penchant for stamping their seat pins with a G.P. and nothing else!

I agree the first letter is a G, but I do not believe the second letter is a P. I also don't think it's an L. I'll believe S, but am willing to listen to other opinions.

Well, I certainly won't question your credentials. The mystery deepens.

Thanks for that! I must admit, though, alphabetic scripts are not my forte.

Let's say it's an "S". I have seen Gipiemme BB cups marked "Gipiemme Special" and "Gipiemme Sprint", but I don't necessarily think either is what the G.S. represents.

And 'Gran Sport' is a fairly ubiquitous moniker.

I've seen one of these posts somewhere on a local bike before. Hmmm...

I grant that the second cursive letter is difficult to identify, it doesn't look like how I would write any of the possibilities: P, T, S or L, but then that "G" isn't something my third-grade teacher would have given a passing grade to, either.
I'm still in the "Giovanni Papillardo de Milano" camp, until somebody can verify that some other company made the "San Marco" posts.
Just for more comparison, here's what one of the vintage 3TTT posts looked like (no family relation to any of the "G. P." posts I've seen)

I have one of those posts; it's from the company that later became "Gipiemme" (G.P.M.)

Hi
im a graphic designer, so I can say that it is a "S" the letter "P" have a different shape in calligraphic style.
And definitely it a seatpost by the italian brand "GS"
see here:
https://shop.ebay.it/i.html?_nkw=gs+s....c0.m270.l1313
best

^I have never heard of that brand before, but the photos definitely settle the matter. Case closed!

me too
but on the box there is written "Produzioni San Marco" so GS it is a little sub brand of San Marco,
as someone wrote before.

Awesome. Put this one to bed. No relation to Gipiemme.

I refuse. The post I had looks nothing like the posts in manmatova's link. I'm sticking with 3TTT for mine. The real question is, what's the relationship between all these various companies?

Oh, be that way, makes no difference to the rest of us.

I disagree. The finish is different, but the shape of the clamp parts, and the round groove in front of the clamp, all resemble the ones in the Italian ebay photos. All that's missing is that strange raised band. Anyway, the ebay photos closely resemble Jan's photos that you linked previously:



[/QUOTE]

Earlier design that was copied by San Marco. Or San Marco was associated with 3TTT which was associated with GPM. Not necessarily in that order.

You're losing me. Are you talking about this post?



If so, it is stamped with the same cursive GS as Jan's post, and the ones on ebay. The ones on ebay come with packaging that proudly displays a block letter GS. I believe the equation GS = GS is pretty well proven. The packaging also suggests a connection to San Marco. So far no one has shown any post stamped GP, or demonstrated any connection between GS and 3TTT or GPM, other than the misreading of GS as GP, which we have now laid to rest.

https://www.velosolo.co.uk/smarco.html