Solved -PJ586- You were ready for that!

[Paul Jaray]

10701: those are close...yours is VERY close and since 10801 was very prolific, you can assume I listed more than 100 models under that name! I won't penalize you, I know I've not been that clear. 
100801: Yes!

10701 : assuming that it is a carrozzeria... Boano ?

10801 was Bertone...that was a very prolific name: I have more than 100 models listed under Bertone's name. Your next number is 10701, very close (100 numbers) to a name that made more than 100 models...I can't be more specific than that 

[Wendax]

#93939: 3-cylinder car, around 1900

I guess I need a clue.

Active till 1907 circa. Production started, according to different sources in 1900 (or 1897 and 1899 according to others!)
1908 is a crucial year for the company.

Still can't find it.  Another clue, please.

[Paul Jaray]

#93939: 3-cylinder car, around 1900

I guess I need a clue.

Active till 1907 circa. Production started, according to different sources in 1900 (or 1897 and 1899 according to others!)
1908 is a crucial year for the company.

Still can't find it.  Another clue, please.

Let's say that nationality will reveal too much! They did cars with 1,2,3 and 4 cylinders, one of them had a Benz engine.

[pguillem]

10801 was Bertone...that was a very prolific name: I have more than 100 models listed under Bertone's name. Your next number is 10701, very close (100 numbers) to a name that made more than 100 models...I can't be more specific than that 

Maybe I was going in the wrong direction. I always thought that the 100 models listed Under Bertone's name were beginning at #10801, so my next guess (Flaminio Bertoni) would be around #10901. Quite improbable, as Bertoni was working for Citroën. But who knows if #10701 was also Bertone ? It would explain your hint to Bertone being very prolific.
So, my final answer is : Bertone.  If it's not, I must confess my total ignorance.  Sorry, and thanks for your help.

[Paul Jaray]

10801 was Bertone...that was a very prolific name: I have more than 100 models listed under Bertone's name. Your next number is 10701, very close (100 numbers) to a name that made more than 100 models...I can't be more specific than that 

Maybe I was going in the wrong direction. I always thought that the 100 models listed Under Bertone's name were beginning at #10801, so my next guess (Flaminio Bertoni) would be around #10901. Quite improbable, as Bertoni was working for Citroën. But who knows if #10701 was also Bertone ? It would explain your hint to Bertone being very prolific.
So, my final answer is : Bertone.  If it's not, I must confess my total ignorance.  Sorry, and thanks for your help.

Yes, Bertone it is!

[Wendax]

#93939: 3-cylinder car, around 1900

I guess I need a clue.

Active till 1907 circa. Production started, according to different sources in 1900 (or 1897 and 1899 according to others!)
1908 is a crucial year for the company.

Still can't find it.  Another clue, please.

Let's say that nationality will reveal too much! They did cars with 1,2,3 and 4 cylinders, one of them had a Benz engine.

Should this be the Tarrant from Australia?

[Paul Jaray]

Yes!

[Wendax]

# 37562, please

[Paul Jaray]

THUNDERBIRD PPG, 1984

[Wendax]

That's a Ford.

[Paul Jaray]

Yes!

[Wendax]

# 77463, please.

[Paul Jaray]

FURY 4-DOOR SEDAN, 1964

[Wendax]

FURY 4-DOOR SEDAN, 1964

Sounds like Plymouth.

[Paul Jaray]

Yes, which one?

[Wendax]

Plymouth (2)

# 6437, please

[pguillem]

Hello again !  My next choices ; #1901, #10901 and #100901 please.
Thanks

[Paul Jaray]

Plymouth (2)

# 6437, please

6437:6-39 BEAUTY SIX COUPE, 1919

[Wendax]

6437:6-39 BEAUTY SIX COUPE, 1919

Auburn?

[Paul Jaray]

Hello again !  My next choices ; #1901, #10901 and #100901 please.
Thanks

1901: 6C 1750 GRAN SPORT SERIE V COUPE-SPIDER AERODINAMICO ZAGATO, 1931
10901: ALFA ROMEO GT 1300 JUNIOR, 1969
100901: MODEL GE GASOLINE 5-PASSENGER TOURING, 1911

[Paul Jaray]

6437:6-39 BEAUTY SIX COUPE, 1919

Auburn?

Yes...which one?

[Paul Jaray]

Sorry, I can't find something about my last numbers;  I have not a lot of time in these days so I think I'd better quit.

As you prefer, thank you for playing!
In case you change your idea here are the clues:
65017:TOURING, 1957 sounds like the start of a Spanish sentence to welcome someone in your house, but it's Japanese!
75017:MODEL 6-40 5-PASSENGER TOURING, 1920, from the States, anagram of Demo Pint.
5017:T2A SALOON TURBINE, 1954, this is easy, from a series of British sperimental cars but you can't find this brand, it closed (but don't tell it to chinese people!)

anyone wanna find these?

[Wendax]

6437:6-39 BEAUTY SIX COUPE, 1919

Auburn?

Yes...which one?

Should be Auburn(1).

[Wendax]

Sorry, I can't find something about my last numbers;  I have not a lot of time in these days so I think I'd better quit.

As you prefer, thank you for playing!
In case you change your idea here are the clues:
65017:TOURING, 1957 sounds like the start of a Spanish sentence to welcome someone in your house, but it's Japanese!
75017:MODEL 6-40 5-PASSENGER TOURING, 1920, from the States, anagram of Demo Pint.
5017:T2A SALOON TURBINE, 1954, this is easy, from a series of British sperimental cars but you can't find this brand, it closed (but don't tell it to chinese people!)

anyone wanna find these?

65017: Mikasa
75017: Piedmont

[Paul Jaray]

Yes, (Piedmont 2)!