Those models are provided in different sizes. Changing their display works by changing their body group value.

The green panels are glowing in the dark.

Bodygroup - Symbol:
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 A
11 B
12 C
13 D
14 E
15 F
16 G
17 H
18 I
19 J
20 K
21 L
22 M
23 N
24 O
25 P
26 Q
27 R
28 S
29 T
30 U
31 V
32 W
33 X
34 Y
35 Z
36 .
37 !
38 ?
39 :
40 -
41 +
42 _
43 (
44 )
45

File Name: Flip-disc_display.7z
File Size: 40.61 KiB
Click here to download Flip-Disc Displays

Seems useful for 80's aperture/TLFS-style rooms.

will be posting cool scripts that use these panels... stayed tuned.