The Alphabet of Nikolsburg is the first known compilation of the Hungarian runes. It dates to the 15th century. Its Latin title says, “
Littere Siculorum quae sculpunt vel cidunt in lignis.” (Approximate translation:
Szekely letters that have been carved in wood.) It is written on parchment, and
it lists 47 signs. 35 of these are simple signs and 11 ligatures or tied letters. The inscription ends with the word 'Amen.'
The runic alphabet of Nikolsburg from 1483.
Source: Forrai, Sandor. Az osi magyar rovasiras az okortol napjainkig, p. 293, 1994.
The origin of the Hungarian runes has been studied by many scholars throughout the centuries, and the script has experienced a new revival in the past 10-15 years.
One of the latest versions of the “Szekely Alphabet” lists 40 signs, three of which are syllabic:
Source: Szabados, Robert. "Osi Hun-Magyar Rovasiras". 24 Nov. 1998.