What is the possible coordinate system for a dxf file (lake balaton)?

[huan.liMZJM3]

I have a dxf file for the lake balaton in Europe with unknown coordinate system and I want to locat it into a correct one. I don't have more information about it.

Here is the rough information that I can provide: 

$EXTMIN

10

512159.94

20

152316.29

30

-10.9

  9

$EXTMAX

10

583143.44

20

191569.59

30

1.199999999999999

  9

$LIMMIN

10

0.0

20

0.0

  9

$LIMMAX

10

420.0

20

297.0

  9

$ORTHOMODE

70

     0

  9

Here is the map I open in Arcgis (the red point at the left bottom corner is with a location about 512205, 152428 (I think with a unit meter) in the unknown system):

Here is the lat and lon I roughly choose on google map:

 

[Pointdump · Accepted solution]

Hi Huan,
Welcome to the Autodesk Forums.
I made 4 COGO Points from the $EXTMIN and $EXTMAX parameters:
#Easting,Northing
512159.94,152316.29
512159.94,191569.59
583143.44,191569.59
583143.44,152316.29

Pure luck, the first Coordinate System I tried, >>>EPSG:23700 HD72/EOV<<<, looks like a rectangle around Lake Balaton. Try it and see if it works. Can you post your DXF?
Dave

[huan.liMZJM3]

Cool, it fits perfect!  Thank you so much!