Junghans delivered a lot of movements for Alpina. The timeframe is not known and no numbers available.
Up to now 13 different movements have been found which Alpina used for their watches.
If you can help with some information, please let me know.
Alpina ? = Junghans J16, would be a J16/1.
It seems that the J16/1 was not used by Junghans. It was intern named J14.
Alpina 205 = Junghans J33a
Alpina 209 = Junghans J47a/1
Alpina 211 = Junghans J47b/1
Alpina 215 = Junghans J33b
Alpina 221 = Junghans J47c/1
Alpina 222 = Junghans J49/1
Alpine 226 = Junghans J17a, would be a J17a/1
It seems that the J17a/1 was not used by Junghans.
Alpina 227 = Junghans 41a, would be a J41a/1.
It seems that the J41a/1 was not used by Junghans.
Alpina 228 = Junghans J42a, would be a J42a/1.
It seems that the J42a/1 was not used by Junghans. Seems to be intern named J43.
Alpina 238 = Junghans J42/1
Alpina 245 = Junghans J33c
Alpine 246 = Junghans J17, would be a J17/1.
It seems that the J17/1 was not used by Junghans.