What is this kanji on a Meiji era 2-sen coin?


I saw this picture of a Meiji era 2-sen coin in [the 2013 game _Tomb
Raider_](https://en.wikipedia.org/wiki/Tomb_Raider_\(2013_video_game\)):

  * Front:

[![Front](https://i.stack.imgur.com/dpMvT.jpg)](https://i.stack.imgur.com/dpMvT.jpg)

  * Back:

[![Back](https://i.stack.imgur.com/B7y8i.jpg)](https://i.stack.imgur.com/B7y8i.jpg)

The front is easily readable, and explained by the caption:

  * [大日本]{だいにっぽん}
  * [明治]{めいじ}[六年]{ろくねん}
  * ２ＳＥＮ

The back is bit more difficult, but I think I got all but one:

  * [二銭]{にせん}
  * [五十枚]{ごじゅうまい}
  * ？[一圓]{いちえん}

What is the one kanji before the 「[一圓]{いちえん}」? Since the rest of it reads
legitimate, I believe that's an actual kanji, but it's not very clear.




The character looks very much like
[**換**](https://en.wiktionary.org/wiki/%E6%8F%9B), which means to swap or
exchange. Since 百錢 exchanges for 一圓, the coin just says 五十枚二銭換一圓 or 50*2銭
coins exchanges for 1圓.




The character looks very much like
[**換**](https://en.wiktionary.org/wiki/%E6%8F%9B), which means to swap or
exchange. Since 百錢 exchanges for 一圓, the coin just says 五十枚二銭換一圓 or 50*2銭
coins exchanges for 1圓.

