assign TeleBT 4.0b serial number range

diff --git a/production.mdwn b/production.mdwn
index ad3cf60474ad8902a3c7b73f16036c3755813627..0fa1da93a0486bf71dc231ac1ff77cde9ebcadc8 100644 (file)
--- a/production.mdwn
+++ b/production.mdwn
@@ -653,3 +653,8 @@ Production build of 250 pieces of EasyTimer v1 by
 
 Prototype build of 6 pieces of EasyMotor v2 by Bdale on 2020.07.25
 
+## sn 7090-7339 ##
+
+Production build of 250 pieces of TeleBT v4.0b by
+[Advanced Circuits](http://4pcb.com), received 2020.08.17
+