F C Parkes /Sun bicycles frame numbers question

[bagpuss]

Hoping some one maybe able to help with this please.
My Sun Manx tt has this number stamped on its rear drop out .
Track end on Sun Manx tt by rebalrid, on Flickr

Is this a Parkes number or a Sun one . {Both owned by the same family} .

Reason for asking is I have read Sun never made a Fixed wheel rear facing drop out for this Model? It has a Sun head badge .
It was re painted in the 70's by Carlton at Worksop{info from previous owner.}
If not what have I here.Sun Manx tt. by rebalrid, on Flickr
Forks are not original to the frame so any number on them does not help.
Thank you for any input.

 

[OldTel]

Re:

Hi, the 'L' is the key, this stands for the Lightweight shop, so it was where the better frames / one off's were made ( Sun and Parkes ), the Manx TT stopped being made around the 'S' or 'T' ( 1951 ish ), you need to check the catalogues. The bike was designed for time trials, it was common request to a builder to have rear facing dropouts at the that time, so why won't it have, as it was not a mass produced product. A fine machine. Thanks Terry

 

[bagpuss]

Re:

Terry you are a mine of knowledge as always . Thank you . Paul

 

[Spokesmann]

I concur S would indicate around 1951, I have Sun frame of a similar vintage.

 

[Jonny69]

The L would tie in with my 38/39 Parkes which has the L.

 

[keithglos]

Re:

I would have thought cast head lugs and head clip would be late 40s. By 1951 this would be well out of date.

Keith

 

[bagpuss]

Re:

Could SL equal Sun Lightweight ? .I will get in touch with a couple of cyclists who I believe have these machines .

Found this one on flick Lugless as well .Different 4 digit fn
Sun Manx TT by Hudsonic, on Flickr

Sun Manx TT by Hudsonic, on Flickr

 

[Midlife]

Just for info I think theres one on ebay at the moment?

Shaun

 

[OldTel]

Re:

Hi, just to keep this thread on track, the first digit is the year and the second and sometimes 3rd alphanumeric is the Sun workshop designation or model. I've attached a dropout from a 1952 Sun Wasp which was made with early Nervex pro lugs, not Sun's basic later copy. Terry

 

[bagpuss]

Re:

Thank you Terry . You have given me an idea . I might try and pull all the pictures and information together on the Manx tt model . A few to go at on the web . Gathering it up should be interesting . I like the design as it is different .