Merge Mongolia P#58 and P#65A [Risolto]

The catalogue lists two types of 500 Tögrög, P#58 (ND (1993) and 1997) and P#65A (2000) which we have followed. However, looking closely at the three notes in question (see images here and here), the 1997 and 2000 are identical types (dated and with a windowed thread) whilst the undated (1993) is slightly distinct in having no date and a normal thread. Can I suggest we group all three into a single entry? Alternatively, if we feel the addition of a date and windowed thread is sufficient, can we move the 1997 date to the same entry as the 2000?

Request sent to add versions in the first entry. When its done I'll move collections and deduplicate :-)

Done