What is the Manufacturer's model number for these PC's, please?

The manufacturer's model number for the PC is Pro Mini.

Questions & Answers: HP Pro Mini 400 Business Mini Desktop (Intel i5-14500T, Intel UHD 770 shared, 16GB DDR4, 512GB PCIe SSD, WiFi 6E, Bluetooth 5.3, 90W PSU, RJ-45, 2 Display Port, 1 x HDMI 2.1, Win 11 Pro)

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HP Pro Mini 400 Business Mini Desktop (Intel i5-14500T, Intel UHD 770 shared, 16GB DDR4, 512GB PCIe SSD, WiFi 6E, Bluetooth 5.3, 90W PSU, RJ-45, 2 Display Port, 1 x HDMI 2.1, Win 11 Pro)

14th Gen Intel Core i5-14500T 1.70GHz Processor (upto 4.8 GHz, 24MB Cache, 14-Cores, 20-Threads, 6 Performance-cores); Intel UHD 770 shared Integrated Graphics
16GB DDR4 SODIMM; 802.11ax Wifi, Bluetooth 5.3, RJ-45, No, USB Keyboard, USB Mouse
90W PSU; Black Color
512GB PCIe NVMe SSD; 1 x HDMI 2.1, 2 Display Port, USB 3.2 Type-C, Headphone/Microphone Combo Jack
Windows 11 Pro, 1 Year Manufacturer warranty from Velztorm (Professionally upgraded by Velztorm)

$779^.99 –