[Scuderia_Turini]

It is from an early Monogram Ford GT - the type that have a blue front and 11 molded into the body.  I have another of the same car which has the wire drop-arm chassis. 
  
Leo

   

[chappyman66]

That looks like the Monogram home set chassis, and often found with the Ford GT / Ferrari 330 P/LM bodies.

[chrisguyw]

Hello Leo,...that is a very early Monogram home set chassis, brass with a guide pin,.......the later home set cars came with a virtually identical aluminum chassis, but, with a guide flag, instead of a pin.

Cheers
Chris Walker

[Scuderia_Turini]

Thank you Chappyman and Chris.
I'm guessing that the pin-guide versions were first, rather than being specially made for set cars. 

Leo

[chrisguyw]

Thank you Chappyman and Chris.
I'm guessing that the pin-guide versions were first, rather than being specially made for set cars. 

Leo

Hi  Leo,.....correct, pin guides pre dated guide "flags",...and other than HO cars, pin guides largely disappeared in the early/mid 60's.

Cheers
Chris Walker

[Kevan]

Is the TSRF chassis still in production, that uses a pin.

[chrisguyw]

Is the TSRF chassis still in production, that uses a pin.

While they are still available at some retailers, they have not been in production for ages,......the initial chassis had a plastic/nylon "keel" (looked like a sharks fin),....with an upgraded stainless  steel "pin" available in 2004(ish),........the "pin" was definitely better, but, many/most modified the chassis to accept a traditional "flag".

From a pure performance perspective "pins" were just fine, and, very quick to Marshall,.....however, "pins" did not help keep the braids separated, so, in a crash the braids could twist/tangle/touch (not good), and also, if you did have an "off", the pins were very adept at finding their way back into a slot, (generally not yours).  

A pin could also be affected by the less than smooth/worn edges of a slot track, particularly the old 60's particle board commercial tracks.

The issue of "braid fouling" is the reason that most manufacturers have adopted the guide flag over the pin, particularly valid when considering use by kids/beginners.

Cheers
Chris Walker