Solved -PJ586- You were ready for that!

[Paul Jaray]

Yes!
+21

8453, please 

KEYSTONE (2)

[Paul Jaray]

9800:MARTIN (16)

Many Martins... May I have the first clue ?

1986-1996 circa.
Please not that those dates may be inaccurate, they change according to the source, but you have the right idea.

I was thinking of Martin Motors, but it doesn't fit the time range. Please give me #9870.  Thanks

Martin Automobiles (MArtin Productions) from Olonne-sur-Mer, builder of the TTM, Tiblury, a Cobra and Gt40 replica and the Matou.

9870: MASTRA

[Otto Puzzell]

Yes!
+21

8453, please 

KEYSTONE (2)

The Keystone was an American automobile manufactured from 1914 until 1915. Designed by Chas C. Snodgrass and built in Pittsburgh, it ran using a Rutenber 55 hp six engine. It was built on a 138 inch wheelbase.

[Paul Jaray]

Yes!
+21

8453, please 

KEYSTONE (2)

The Keystone was an American automobile manufactured from 1914 until 1915. Designed by Chas C. Snodgrass and built in Pittsburgh, it ran using a Rutenber 55 hp six engine. It was built on a 138 inch wheelbase.

Yes!
+21

[Otto Puzzell]

Great!

8504, please

[Paul Jaray]

Great!

8504, please

KINGS COUNTY

[faksta]

Not that.

Must be a British sports car maker then, Force Racing Cars from Staffordshire. Here is one of theirs: Force LM hillclimb car.

[Paul Jaray]

Not that.

Must be a British sports car maker then, Force Racing Cars from Staffordshire. Here is one of theirs: Force LM hillclimb car.

Not that. 

[pguillem]

9870: MASTRA

This one ?

In 1935 Trojan tried to move upmarket with the Mastra Limousine (above); it was not a success, and their car production finished in 1937. They continued their commercial vehicle range: you can see, below, the Trojans available in 1950 when the Minimotor was also being produced. The 'Brooke Bond Tea' van was Trojan's most well-known vehicle; boys of a certain age would remember it as a Dinky Toy.

If it's OK, then #10110 please.  Thanks.

[Paul Jaray]

9870: MASTRA

This one ?

In 1935 Trojan tried to move upmarket with the Mastra Limousine (above); it was not a success, and their car production finished in 1937. They continued their commercial vehicle range: you can see, below, the Trojans available in 1950 when the Minimotor was also being produced. The 'Brooke Bond Tea' van was Trojan's most well-known vehicle; boys of a certain age would remember it as a Dinky Toy.

If it's OK, then #10110 please.  Thanks.

that one!
+22
10110:MENUS-VAN HORN

[targhediferro]

I'd like to nave 4806, thank you.

[Paul Jaray]

I'd like to nave 4806, thank you.

DUCROISET

[pguillem]

10110:MENUS-VAN HORN

All I was able to find

The Menus-Van Horn Motor Company was indicated in a 1,902 trade journal as the manufacturer of an automobile. This probably was in error. The firm was in the auto accessories field. Early in 1903 Menus-Van Horn moved from its original location at 11 High Street in Boston to 49 Galen Street in Waterloo, Massachusetts.

Is it true ?  Anyway, my next guess will be for #10199.  Thanks.

[D-type]

8010:JAK

The only JAK I can find is JAK Motorworks, 21 thornycroft Street, Campbelfield, Victoria, Australia who say they are car customisers.  Maybe they produced a JAK custom car.

As I am probably wrong, can I try 4250 next please?

[Paul Jaray]

10110:MENUS-VAN HORN

All I was able to find

The Menus-Van Horn Motor Company was indicated in a 1,902 trade journal as the manufacturer of an automobile. This probably was in error. The firm was in the auto accessories field. Early in 1903 Menus-Van Horn moved from its original location at 11 High Street in Boston to 49 Galen Street in Waterloo, Massachusetts.

Is it true ?  Anyway, my next guess will be for #10199.  Thanks.

That's what I have too!
+21
10199: METZ (2)

[Paul Jaray]

8010:JAK

The only JAK I can find is JAK Motorworks, 21 thornycroft Street, Campbelfield, Victoria, Australia who say they are car customisers.  Maybe they produced a JAK custom car.

As I am probably wrong, can I try 4250 next please?

Pro-Car Engineering from Katowice, Poland, took over Pro-Car's business and built the Nestor and the Majestic.
4250: too close to your 4300.

[Otto Puzzell]

Great!

8504, please

KINGS COUNTY

Date range, please. 

[Paul Jaray]

Just 1903.

[Otto Puzzell]

Just 1903.

Pass   

8555, please.

[Paul Jaray]

Wise choice...
Kings County Automobile Company, incorporated in Brooklyn, New York in 1903.
8555:KLINGENBERG

[João]

Ferrari (1) : Ferrari S.p.A. is an Italian sports car manufacturer based in Maranello, Italy. 

10.142 please.

[Paul Jaray]

Ferrari (1) : Ferrari S.p.A. is an Italian sports car manufacturer based in Maranello, Italy. 

10.142 please.

Yes! 20+555
10142:MERKEL (1)

[João]

 

Merkel (1) : MERKEL — Milwaukee, Wisconsin — (1905–1907) — Early in 1901 Joseph F. Merkel bought out the Layton Park Manufacturing Company in Milwaukee and moved his Merkel Manufacturing Company into the premises. Production of motors, bicycles and the "Flying Merkel" motorcycle followed — in September of 1904 he changed his firm's name to Merkel Motor Company and moved his enterprise into the automotive field.

Next : 12934 please.

[Paul Jaray]

Merkel (1) : MERKEL — Milwaukee, Wisconsin — (1905–1907) — Early in 1901 Joseph F. Merkel bought out the Layton Park Manufacturing Company in Milwaukee and moved his Merkel Manufacturing Company into the premises. Production of motors, bicycles and the "Flying Merkel" motorcycle followed — in September of 1904 he changed his firm's name to Merkel Motor Company and moved his enterprise into the automotive field.

Next : 12934 please.

+23
12934:ROLLSMOBILE 

[pguillem]

10199: METZ (2)

May I have the time range ?