LG 25" 2560x1080 monitors: what's the panel code?

[kant]

LG has 3 25" 2560x1080 monitors. I have looked for differences between them and it seemed that it came down to ports and speakers.

25UM55P no dvi, 2 hdmi, 1 DP. no speakers
25UM64S 1 dvi, 2 hdmi, 1 dp. speakers
25UM65P 1dvi, 2 hdmi, 1 dp. speakers.

I went with the 55P because it's slightly cheaper, I don't need speakers, and B&H had one in stock while the 64s has a 7 day shipping estimate.

I downloaded the manuals last night and found a more comprehensive listing of the specs there than on the website and one spec jumped out at me.

UM64/65
"63.5 cm TFT (Thin Film Transistor) LCD (Liquid Crystal Display) Screen Diagonal length of the screen: 63.5 cm 25" class (25" / 63.5 cm diagonal)" with a pixel pitch of "0.2286 mm x 0.2286 mm"


UM55:
"64 cm TFT (Thin Film Transistor) LCD (Liquid Crystal Display) Screen Diagonal length of the screen: 64 cm" with a pixel pitch of "0.2325 mm x 0.2325 mm"


That looks like a different panel, no?

Can anyone with a 25UM64/64 shed some light on this?

 

[kant]

I've got it set up and on.

switchresx says it's
Vendor: GSM-1E6D
Product: 59F1

This is the (partial) EDID dump but I don't know what I'm looking at.

EDID report generated by SwitchResX Version 4.5.0 (Intel - 64-bit) for display LG ULTRAWIDE



-----------------------------------------------------
Valid EDID block #0: checksum ok
Valid EDID block #1: checksum ok

-----------------------------------------------------
------------------- MAIN EDID BLOCK -----------------
-----------------------------------------------------

EDID Version........1.3
Manufacturer........GSM (1E6D)
Product ID..........23025 (59F1)
Serial Number.......0000ED71

Manufactured........Week 10 of year 2014
Max H Size..........58 cm
Max V Size..........24 cm
Gamma...............2.20

Display Supported Features:
---------------------------
Power Management: Active off
Power Management: Suspend
Power Management: Standby


Display type:
-------------
RGB 4:4:4 & YCrCb 4:4:4 Color Encoding Formats
Display is non continuous frequency
Default color space is not sRGB standard
Preferred timing mode includes Native Pixel Format


Input signal & sync:
--------------------
Digital Input
Color Bit Depth is undefined
Digital Interface is not defined


Color info:
-----------
Red x = 0.660 Green x = 0.306 Blue x = 0.149 White x = 0.313
Red y = 0.331 Green y = 0.609 Blue y = 0.062 White y = 0.329



Monitor Description blocks:
---------------------------
Descriptor #0 - Timing definition:
Mode = 2560 x 1080 @ 60.000Hz
Pixel Clock............. 185.58 MHz Non-Interlaced

Horizontal Vertical
Active.................. 2560 pixels 1080 lines
Front Porch............. 64 pixels 3 lines
Sync Width.............. 64 pixels 10 lines
Back Porch.............. 96 pixels 18 lines
Blanking................ 224 pixels 31 lines
Total................... 2784 pixels 1111 lines
Scan Rate............... 66.659 kHz 60.000 Hz

Image Size.............. 677 mm 290 mm
Border.................. 0 pixels 0 lines

Sync: Digital separate with
* Negative vertical polarity
* Negative horizontal polarity