A fact from 130 mm/50 B13 Pattern 1936 appeared on Wikipedia's Main Page in the Did you know column on 16 February 2010 (check views). The text of the entry was as follows:
Did you know... that the Soviet 130 mm/50 B13 Pattern 1936 naval gun was produced in three versions with mutually incompatible ammunition and range tables?
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Why do you name this gun "B13", although this is called "B-13" in the Soveit Union (and in Russia today)? Perhaps, this gun was used under tha name "B13" in Finland?--114.145.59.235 (talk) 17:39, 24 June 2010 (UTC)[reply]
Hmm, I see, but there is spelling "B13" only in two places in navweaps website, on the other hand "B-13" is used 11 times. I don't know why there are two variants.
Navweaps site had the B13 name without hyphen in the title, so I used that. I do not speak russian, so I had to use finnish or english sources. That is also the reason why the "Service in Soviet Union" chapter of the article is so short. MKFI (talk) 12:49, 25 June 2010 (UTC)[reply]
Yes, I don't think that you made a mistake or are misleading.
I simply wonder if there are some mistakes in the site, because there are used spellings with hyphen also in the titles, for example, "B-1" in an other page in Navweaps site, "B-2" and "B-18" here, "B-23" here and "B-34" here. See, please, more info from the list. There are also "AK-xxx", "SM-xxx", "ZIF-xxx" (with hyphen) and so on. There are used spellings with hyphen in the all of pages except the page of the gun pattern 1936 in the site. Furthermore there is only once used "B13" except the title in the page of the gun pattern 1936.
I wonder if there is a misprint (typo) without hyphen...