The complete description of the manuscript is clear on what it contains (as any buyer would want to know). I have bolded the relevant information.
"[Pavia or Milan, c.1470]
207 x 142mm. 198ff:1-138, 14-1510, 168, 176, 18-208, 219, 227(of 8, lacks 5), 23-246, 258, textually COMPLETE, but the lacking leaf perhaps with a misplaced or incomplete miniature, vertical catchwords on inner ruling of most final folios, 29 lines in brown ink in a round humanistic bookhand between 30 horizontals and a pair and a single vertical, justification:147 x 70mm, rubrics in pink, not supplied to Trionfi, two-line initials of burnished gold against grounds alternately red or blue with white decoration with marginal sprays of three golden flowerheads with curling penwork tendrils, penwork not supplied after f.35, opening folio with FULL-PAGE BORDER WITH FOLIAGE AGAINST A GROUND OF BURNISHED GOLD inhabited by putti, birds and animals, the upper border with a MINIATURE SHOWING LAURA CROWNING PETRARCH WITH A LAUREL WREATH, the lower border with a young woman firing an arrow into the heart of a young man and a roundel with the arms of the Visconti, the side border with a roundel with Apollo pursuing Daphne, FOUR MINIATURES OF THE TRIUMPHS, three full-page and one part-page (dampstaining affecting margins, especially the final ten leaves but evident at centre of outer edge throughout, and the cause of pigment loss from the lower inner corner of the border on f.1, from the lower edge of f.150v and the outer cusp of f.166, small vellum losses from margin on two leaves). Panelled brown leather by Bedford, ruled and stamped in blind (very slight rubbing at extremities).
Alphabetical index of first lines of Il Canzoniere ff.1-7v; Petrarch Il Canzoniere ff.9-150v: nos 1, 3, 2, 4-79, 81-82, 80, 83-92, 94-96, 93, 97-120, 122, 'Donna mi viene, 123-242, 121, 243-339, 342, 340, 351-54, 350, 355, 359, 341, 343, 356, 344-49, 357-58, 360-66; Petrarch I Trionfi ff.151-190: Triumph of Love I f.151, II f.153v, III f.157, IV f.160, Triumph of Chastity f.163, Triumph of Death Ia f.166v, I f.166v, II f.170v, Triumph of Fame I, early redaction f.174, I f.176v, II f.179, III f.182, Triumph of Time f.184, Triumph of Eternity f.188; Leonardo Bruni, Vita Petrarce, in Italian ff.191-197; Petrarch, Nota de Laura in Latin ff.197-197v, and Italian f.197v-198."
In other words, the complete text of I Trionfi is present, but there are only four miniatures of the triumphs.