The serial number of the gun 292.51779 will not help with the value, other than telling manufacture date, (first 3 numbers) The best way to determine actual value is to search the on-line auctions, such as www.gunbroker.com and www.auctionarms.com or even www.proxibid.com enter your details in the search and see what is selling and for how much. You can also search the archives and or sold items to get an idea of what your gun is selling for. Another place to look is The blue book of modern black powder values, available from www.midwayusa.com and www.bluebookpublications.com as well as many of the other hunting and firearm stores. Also available to NRA members on - line for free at www.nragive.org That will give you an idea of the general value. Guns tend to have some regional value too, say a Thompson Center Seneca may be worth a bit more in the north east than in the mid west, and a Ruger old army may sell higher in the northwest than the east coast. Don't forget condition has allot to do with value, and with black powder the bore is king. You may have a gun worth for example $500, but the same gun with a bad or rusted bore may only be worth $150 so compare apples to apples.
10680
Miroku is a firearms maker located in Japan
$100 in good condition $125 in great condition $150 in Excellent Condition
japan
There have been many over the years most were "store brands" during the 70's black powder shooting surge with the exception of Ultra-Hi and Miroku they were sold in the US under there respective names.
Miroku Firearms Mfg. Co./ 537-1 Shinohara/ Nangoku City, Kochi-Pref Japan
Japan by B.C Miroku
==Miroku Firearms Web Site == http://www.miroku-jp.com/gun/
I can say that your Browning BL-22 was made between 1970-2003 by Miroku of Japan.
Actually, I think it's all just "Sango's theme," and "Miroku's Theme" and stuff like that. Unless you wanna fly to japan and get THEIR version, but yeah.
The value of your miroku will depend on grade and contition would range from about 750 to 1200
Sears Roebuck did not make quality guns, they made affordable guns so its condition is everything! 100.00 - 150.00 tops! Best luck!