How To Identify Foreign Postmark (Dates)

Hi Everyone,
Today I am going through my stamps (no different from any other day really, LOL). And... I came across these four stamps.

I can see that the postmark shows what I will guess as Roman Numerals?

So I will also take a guess that the red stamp reads:
14, July, 1925?

But then looking at the green stamp, looks like a negative #1, so I guess I am wrong?

Anyway, though they are heavily postmarked, they are dear to me, so mysterious LOL.. Thank you for your help! Oh, I did do a search for "identify foreign postmarks" but nothing came up.
SueStamps

The roman numerals typically designate the month of the year and is typically shown as dd/mm/yyyy, so in your examples, the correct date is 14 July 1925; 1 June 1922; 8 February 1922; and 1 February 1911.

Just like on a date stamp you can buy from a stationery store, there is the hyphen typically added to the date dial so you can show the first of the month as a "1" or a "-1" both of which would be correct.

Hi wt1,
Thank you for the explanation, especially about the hyphen and in comparison to a date stamp. Very interesting!
I am having a wonderful stamp ID day, lolol...
Thank you so much.
SueStamps

Sue, you may wish to consider changing your
thread topic to "Belgian Railway Parcel Stamps" or similar,
so other students
can learn from your thread.

I collect them, and prefer on piece if I can get them.








500 still to sort.....