Help With 1851? Stamp Less Cover From Nassau, NY To Ellwangen Germany

letter from Nassau, NY to Ellwangen Germany
send on dec 12, new york transitstamp on back dec 14 en recieved ellwangen 12 januari

i think the yeardate on backstamp is 1851, could be 1831

i think it states, very badly spelled via liverpool per steamer

i see black 24 crossed out and a black 29

i see a handstamp in red 12 1/2 or 1/4 (or another decimal?)

i see red handstamp" America over Bremen"

i see pinkish/purple inked:
53
8
17 1/2
Y

and red chark 1/5

can anyone make sense to me of all these markings and rates?
does the combination give us a better idea of year?

sorry I am not a "rate and route" person, hoping for help

The Ellwangen postmark was in use from 1845 to 1857, so 1851 is good.

Thank you for that Germania, we have the date confirmed!

Nassau, N.Y. is near Albany, this is not the county.

The letter was sent pursuant to the postal treaty with Bremen. The letter was sent unpaid, so the New York post office debited Bremen 29¢ (black manuscript at top right) comprised of a 24¢ sea mail plus the 5¢ US inland.
At Bremen the post office struck the AMERICA UBER BREMEN exchange marking and converted the 29¢ to 10 11/12 guter groschen. There was a 1 1/3 ggr transit fee to Hanover resulting in the red 12 1/4 ggr handstamp at top center. This was equal to 53 kreuzer (manuscript center)
The Thurn & Taxis Post charged another 8 kr transit resulting in the "/8" under the "53" for a total of 61 kr. or 1 gulden 1 kr. (I think the red manuscript over the Nassau postmark is 1/1). There was an additional 4 kr local charge (the manuscript number that looks like a 7) for a grand total 65 kr. or 1 gulden 5 kr. written as a manuscript 1/5 (bottom center).

edited to correct typo in the amount of the rate handstamp

The letter was probably carried by the Cunard Line America departing New York on December 17 or the Collins Line Arctic departing New York December 20

SPQR, this is wonderfull, thank you so mutch

one last question, did both the steamer options go to liverpool?

yes, both steamer options went to Liverpool; however, some closed-bag mail was put off at Queenstown (now Cobh) Ireland and carried by ship from there. I don't know off the top of my head if mail to Bremen was put off at Queenstown or Liverpool.

SPQR, thank you !

this confirms the very odd spelling of Liverpool at top of this letter