diff --git a/README.md b/README.md
index 86c2c01d..02a70094 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,17 @@ To allow automatic handling of all Bresser weather station variants, the decoder
 | 7003300       | Weather Station | decodeBresser**7In1**Payload()  |
 | 7803300       | Weather Sensor  | decodeBresser**7In1**Payload()  |
 
+Some guesswork:
+
+| Numbering Scheme | Type |
+| ---------------- | ---- |
+| 700[25\|32\|33]*   | Weather Station, Base + Sensor |
+| 780[25\|32\|33]*   | Weather Station Sensor (Replacement) |
+| 790*             | Weather Station Base (Replacement) |
+| 700[99]*         | Accessory Sensor |
+
 **1)** Manual configuration required, UV flag is set erroneously; see https://github.com/matthias-bs/BresserWeatherSensorReceiver/issues/42
+
 **2)** The part number is specific to the actual variant. 
 
 ## Configuration