assign a serial number block for TeleMega v4.0

diff --git a/production.mdwn b/production.mdwn
index ff2be70becd8ec2885e1befc734669b4ce2b3c7a..9e2a091b19e420545705432aa1fb70e1d2578ed6 100644 (file)
--- a/production.mdwn
+++ b/production.mdwn
@@ -634,3 +634,9 @@ Production build of 500 pieces of EasyMini v2.0a by
 
 Production build of 100 pieces of TeleMini v3.0a by
 [Seeed Studios](https://www.seeedstudio.com/), received 2020.01.21.
+
+## sn 6581-6830 ##
+
+Production build of 250 pieces of TeleMega v4.0 by
+[Advanced Circuits](http://4pcb.com), received 2020.02.12
+