ZyXEL GS1900-8 model identification

Hello!

I have the ZyXEL GS1900-8 Switch.

root@OpenWrt:/# ubus call system board
{
        "kernel": "5.15.167",
        "hostname": "OpenWrt",
        "system": "RTL8380",
        "model": "ZyXEL GS1900-8 Switch",
        "board_name": "zyxel,gs1900-8",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "23.05.5",
                "revision": "r24106-10cc5fcd00",
                "target": "realtek/rtl838x",
                "description": "OpenWrt 23.05.5 r24106-10cc5fcd00"
        }
}
root@OpenWrt:/# 

How can I identify the exact model for the firmware upgrade?

kind regards

checked bottom sticker ?

A/B not mentioned. Can I get it from the CLI?

Page 18

See the Model Name and Revision on the Web Configurator. Go to Getting Started > Device > Information Screen.

EDIT: if you dont see the revision on the back, it might be A1.