Production run of 250 pieces of TeleGPS v2.0 by
[Advanced Circuits](http://4pcb.com), received 2017.09.16.
+## sn 4190-4439 ##
+
+Production run of 250 pieces of TeleMega v3.0 by
+[Advanced Circuits](http://4pcb.com), received 2017.11.30.
+
+## sn 4440-4939 ##
+
+Production run of 500 pieces of EasyMini v2.0 by
+[Advanced Circuits](http://4pcb.com), received 2017.12.19.
+
+## sn 4940-5137 ##
+
+Production run of 198 pieces of TeleMetrum v2.0b by
+[Advanced Circuits](http://4pcb.com), received 2018.03.10.
+
+## sn 5138-5141 ##
+
+Hand build of 4 pieces of TeleLCO v2.0 by Bdale on 2017.05.27.
+
+## sn 5142-5145 ##
+
+Hand build of 4 pieces of TeleFireEight v1.0 by Bdale on 2017.05.30.