Help With An Inflation Era Germany Cover

Greetings all. I'm taking a break from my 1851 3c plating and started working with some German stamps and covers. Below is a cover I've been looking at and wanted to confirm with folks here that I am describing it correctly and that I have properly identified the stamps. I was also wondering if anyone had a table showing the postage rates in Germany during this time (1920s). Sounds like Michel has one in its catalog but I have not acquired one of those yet.
The cover looks to have to be sent from Dortmund, Germany to New York, City using a 150 mark rate. It is postmarked with a machine cancel from Dortmund, Germany dated February 5, 1923.

I have identified the stamps to be:
100 mark is a Mi 219 - I couldn't determine the watermark, so I am using perforations to distinguish from Mi 247. I dont have a gauge that measures 1/4 inch increments but it lines up best with 14.5.
30 mark is a Mi 208P - It looks to be a two-color posthorn with flat plate printing showing thick letters, large stars and thick cords.
20 mark is a Mi 230W - It is a single color posthorn with rotary press printing showing thin letters and small stars.

Another question would be if there is anything present/or not that would lead on to conclude this is a fake? Thanks in advance for your input.

Regards- Harper1249

ID's are likely correct, and the 150 M rate is correct for that date. I don't see anything that screams fake.

The perfs on MiNr. 219 and 247 are the same. The only difference is the watermark. It's more likely to be MiNr. 219, though, due to the date. MiNr. 247 was issued in Feb, but Michel doesn't say when. Since this was sent 5 Feb, it's more likely to be the older issue. Doesn't really matter as far as value goes, as they're both common on cover.

Thanks PostmasterGS. So what is Michel saying when its lists "perf. K 14-3/4:14-1/4" for MiNr. 219 and "perf. K 13-3/4:14-1/4" for MiNr. 247?

They're saying typo! MiNr. 247 is also K 14 3/4:14 1/4