I've tracked down datasheets on the L700, the L800 and the L810. None of these datasheets carry a publication date.
The L700 is based on a VIA Eden X2 Dual Core 1.0GHz or Nano 1.0GHz CPU with the VX900 chip set. It supports up to 4GB of RAM.
The L800 is based on Intel Atom D2550 Dual Core 1.86 GHz CPU with NM10 chipset.
The L810 is based on a 2.0GHz Intel Quad Core Celeron J1900.
In January 2015 the L810 was launched:
To deliver excellent processing, graphics, and energy efficiency for Virtual Desktops solutions, the L810 thin client is based on a quad-core Celeron J1900 CPU running at 2.00 GHz and supports up to 8GB DDR3L memory capability. The new Intel Celeron SoCs has integrated Intel HD Graphics with the support of DirectX 11 and DVI dual display outputs. The I/O connectivity offers one Gigabit LAN, six USB2.0 ports, one USB3.0 ports, dual DVI displays, and audio ports. The expansion options of L810 are easy implement by applying the internal USB pin header for smart card reader and the mini PCIe connector for WiFi module.
The Praim Compact is an L700.
The 10zig 58XX is an L800.
The 10zig 58XXQ is an L810