user7147: I've found several sources that indicate that Arpad Elo was a "master-level chess player", but it's been very difficult to find any information about what Elo's own rating would have been under his own system - primarily because if you do the obvious Internet searches like arpad elo rating, you just get flooded with search results about the Elo rating system itself, and other players' Elo ratings.  The Wikipedia article on Elo doesn't include any information about his own rating, and Chessmetrics doesn't include any information about Elo's rating either.
Is there any source that gives any information about what Elo's own rating would have been?

user7147: According to this article on the Chessbase site:

Using his own rating system to estimate his playing strength, he
calculated his best five-year average rating at 2230 – enough to have
earned for him the national master title.

In this context, "national master" refers to the USCF National Master title.

user12629: Arpad Elo was rated 2065 in the August 5 1960 Chess Life ratings list. I believe this list was the first he appeared in that used his Elo system rather than the previous Harkness system. Elo turned 57 years old that month, and he was likely stronger than that when he was younger.
In the November 20 1950 ratings list, which used the Harkness system, Elo was rated 2266. In this system, this rating was considered expert level.

7147: <p>I've found several sources that indicate that Arpad Elo was a &quot;master-level chess player&quot;, but it's been very difficult to find any information about what Elo's own rating would have been under his own system - primarily because if you do the obvious Internet searches like <code>arpad elo rating</code>, you just get flooded with search results about the Elo rating system itself, and other players' Elo ratings.  The <a href="https://en.wikipedia.org/wiki/Arpad_Elo" rel="noreferrer">Wikipedia article</a> on Elo doesn't include any information about his own rating, and <a href="http://www.chessmetrics.com/cm/" rel="noreferrer">Chessmetrics</a> doesn't include any information about Elo's rating either.</p>
<p>Is there any source that gives any information about what Elo's own rating would have been?</p>
 7147: <p>According to <a href="https://en.chessbase.com/post/profeor-arpad-e-elo-a-fond-remembrance" rel="noreferrer">this article</a> on the <a href="https://en.chessbase.com/" rel="noreferrer">Chessbase</a> site:</p>
<blockquote>
<p>Using his own rating system to estimate his playing strength, he
calculated his best five-year average rating at 2230 – enough to have
earned for him the national master title.</p>
</blockquote>
<p>In this context, &quot;national master&quot; refers to the USCF National Master title.</p>
 12629: <p>Arpad Elo was rated 2065 in the <a href="http://uscf1-nyc1.aodhosting.com/CL-AND-CR-ALL/CL-ALL/1960/1960_08_1.pdf" rel="noreferrer">August 5 1960</a> Chess Life ratings list. I believe this list was the first he appeared in that used his Elo system rather than the previous Harkness system. Elo turned 57 years old that month, and he was likely stronger than that when he was younger.</p>
<p>In the <a href="https://archive.org/details/ChessLife1950/page/n91/mode/2up" rel="noreferrer">November 20 1950</a> ratings list, which used the Harkness system, Elo was rated 2266. In this system, this rating was considered expert level.</p>
