Here's a photo of heart-like markings on the spoke heads from a wheelset I have. The wheels came with a... you guessed it, De Rosa (although I don't have any reason to believe they're original to the bike).
http://www.chainedrevolution.com/
Tam Pham Huntington Beach, CA - USA
On 7/30/07, Chuck Schmidt <chuckschmidt@earthlink.net> wrote:
>
> DT = DT (Switzerland)
> U = Union (Germany)
> R (backwards) = Redaelli (Italy)
> A = Alpina (Italy)
> Y = Prym (Germany)
> E = Trois Étoiles, translation 3 star, Robergel (France)
> crescent = Robergel (France)
> clover = Berg-Union (Switzerland)
> star = Stella (Italy)
>
> Might be some mistakes above... contribute what you know...
>
> Chuck Schmidt
> South Pasadena, CA USA
> http://www.velo-retro.com (reprints, t-shirts & timelines)