Solved -PJ586- You were ready for that!

[Paul Jaray]

Is 30017 a De La Vergne? If not I need another clue.

Not that.
An american vehicle using a KANE-PENNINGTON engine. Now for the 3rd clue I have to help a bit more...the builder (there was no company) was from Charlevoix, Michigan.

[Otto Puzzell]

2nd less useless clue: type of car is obvious, engine is obvious, I don't have a defined time range...the place will give it away..it starts with A!

Antique and Collectible Autos Inc. 35 Dole Street Buffalo NY?

Not that.

Blimey! Another clue, please.

[Paul Jaray]

2nd less useless clue: type of car is obvious, engine is obvious, I don't have a defined time range...the place will give it away..it starts with A!

Antique and Collectible Autos Inc. 35 Dole Street Buffalo NY?

Not that.

Blimey! Another clue, please.

8387 is not a small number but yet it starts with 'A'. Ok that's not a clue...it's from South Carolina but probably that is useless too.
The Company is named after it's builders, not a long name, BTW.

[pguillem]

100048: Built in New York city.

100048 : 1895 2HP "Motor Road Wagon" "New York City" : I can't find anything. Am I going in the wrong direction ?

[Wendax]

46375:HIGHWHEELER MODEL 10 RUNABOUT 4\5 HP 1908

That's a Holsman.

[Otto Puzzell]

I'm getting nowhere. Cobra Kit Car companies are virtually uncountable. Are there any more clues on offer?

[Wendax]

88447:HORIZON GL 1978

That should be a Simca.

[Wendax]

102838:JAGUAR XK140 COUPE 1957

Sounds like a Zagato to me.

[Paul Jaray]

100048: Built in New York city.

100048 : 1895 2HP "Motor Road Wagon" "New York City" : I can't find anything. Am I going in the wrong direction ?

So far you are pretty ..stable 
This makers, starts with 'W' and it's the union of 2 surnames Wxxxx & Lxxxxxx. It's not a well documented maker and useful clues may be hard here.

[Paul Jaray]

I'm getting nowhere. Cobra Kit Car companies are virtually uncountable. Are there any more clues on offer?

You are right, but fortunately this one is not that known...it means that if you find a Cobra manufactuer, starting with A (near the very bottom of the A-named makers, but not Az), named after its builder, it's probably your guy.
Just to give you an idea, this maker is reported in 3 books of mine, ERA, for example, in 6.
I can say that it rymes with something He sure was looking for! (more or less)

[Paul Jaray]

46375:HIGHWHEELER MODEL 10 RUNABOUT 4\5 HP 1908

That's a Holsman.

88447:HORIZON GL 1978

That should be a Simca.

102838:JAGUAR XK140 COUPE 1957

Sounds like a Zagato to me.

Why I'm not surprised?
+150!

[Wendax]

25886,71558, 92633, please.

[Paul Jaray]

25886,71558, 92633, please.

25886:MK II B  early 50s
71558:COTTIN-DESGOUTTES TYPE M DE COURSE GRAND PRIX TORPEDO BATEAU  mid 20s
92633: 1400 GSR COUPE  mid 70s

[Wendax]

92633: 1400 GSR COUPE  mid 70s

That's a Subaru.

[Paul Jaray]

So far so good..

[Wendax]

71558:COTTIN-DESGOUTTES TYPE M DE COURSE GRAND PRIX TORPEDO BATEAU  mid 20s

That must be the coachbuilder Ottin.

[Paul Jaray]

71558:COTTIN-DESGOUTTES TYPE M DE COURSE GRAND PRIX TORPEDO BATEAU  mid 20s

That must be the coachbuilder Ottin.

+50!

[Wendax]

25886:MK II B  early 50s

Elva?

[Paul Jaray]

25886:MK II B  early 50s

Elva?

Not elva.
Different sources report 1951 as a correct year.

[Wendax]

25886:MK II B  early 50s

Different sources report 1951 as a correct year.

A useless clue, please.

Further on, numbers 22222 and 27500, please.

[Paul Jaray]

25886:MK II B  early 50s

Different sources report 1951 as a correct year.

A useless clue, please.

Further on, numbers 22222 and 27500, please.

Probably not so useless...it's British.
22222: Grand Prix 1911
27500: MONACO 500 COUPE 1967

[Wendax]

25886:MK II B  early 50s
Different sources report 1951 as a correct year.

Probably not so useless...it's British.
22222: Grand Prix 1911
27500: MONACO 500 COUPE 1967

22222 is quite hard, as there were three Grand Prix cars in 1911 having names beginning with C. I have atry at Cottin-Desgouttes.
25886 must be a Dellow then.
27500 is a Dodge.

[Paul Jaray]

25886:MK II B  early 50s
Different sources report 1951 as a correct year.

Probably not so useless...it's British.
22222: Grand Prix 1911
27500: MONACO 500 COUPE 1967

22222 is quite hard, as there were three Grand Prix cars in 1911 having names beginning with C. I have atry at Cottin-Desgouttes.
25886 must be a Dellow then.
27500 is a Dodge.

Did you took a copy of my index? 
Yes x 3!

[Wendax]

Numbers 63558, 74625 and 81477, please.

[Otto Puzzell]

I'm getting nowhere. Cobra Kit Car companies are virtually uncountable. Are there any more clues on offer?

You are right, but fortunately this one is not that known...it means that if you find a Cobra manufactuer, starting with A (near the very bottom of the A-named makers, but not Az), named after its builder, it's probably your guy.
Just to give you an idea, this maker is reported in 3 books of mine, ERA, for example, in 6.
I can say that it rymes with something He sure was looking for! (more or less)

Ron Ayers Classic Cars;  Simpsonville, SC?