By mapping both glyphs together and counting the distances between them a firmer foundation for speculation can be established:

 

side b (664)			side a (670)
261		402	481		188
	Ab4-18 (262)			Aa6-66 (482)
262		884
1334

The distances are all multiples of 2, indicating that 2 glyphs are needed for a day.

884 glyphs = 442 days and 262 + 188 = 450 glyphs equals 225 (= 9 * 25) days:,

 

442		224
	Aa6-66 (332 + 241 = 573)		Ab4-18 (131)
	225

442 + 225 = 667 days and 2 * 667 = 1334 glyphs.