The record starts on image 74 and goes through image 77.

Some background and history: this is not technically a marriage record. It is a promessa (promise to marry), sort of a civil contract. When the Kingdom of Two Sicilies took back over the Kingdom of Naples after Napoleon's defeat and the Congress of Vienna, it decided to keep the civil registration system instituted by Napoleon, but made a few changes, one of which was dumping civil marriage and restoring church marriage as the legal standard. So the promessa came into being as a civil contract for the couple to pursue a future marriage. The promessa was good for a year. Two copies were made - one stayed at the comune hall and the second was given to the couple to give to the priest at the church celebrating the marriage. He would certify that the marriage had been conducted and return the copy to the comune office, where the ceremony information was entered into the main record (similar to what was done with baptisms). You see the ceremony information on the right hand column of the first page. Often the promessa and the ceremony were completed the same day or within a day or two; sometimes it was quite a bit later; and sometimes something came up to impede the marriage and it was never celebrated in the church, in which case the right side would be blank.

The first page is the most important - it has the information about the couple on the left and the ceremony information on the right:

• Groom - Giuseppe Mauro, age 19, born in Sala, living in Sala, property owner, son of deceased Generoso and living Rosalba Pinto (lol is there a language filter on this forum? - her surname is P I N T O - apparently it's a vulgar word in Portuguese)
• Bride - Carolina Pecori, age 18, born in Gragnano, living in Sala, daughter of Catello, townsman, and deceased Francesca Auletta
• Marriage celebrated at San Pietro church on 1 Jun 1829

The bottom of the second page is also somewhat important because it lists the contents of the processetti - the supporting documents that were used to confirm that the marriage could go forward. At a minimum this would include the birth or baptism records of the spouses. Often, if a father of a spouse was deceased, it would include a copy of the father's death record. If the father was deceased (and thus could not give their consent), then permission would be sought from the paternal grandfather of the spouse. If he was deceased, his death record would be added to the processetti and permission would be sought from the mother of the spouse. If she was deceased, her death record would be added and permission would come from a family council of the spouse. Also included in the processetti would be the death record of the spouse's previous partner if they were widowed. The processetti for this marriage include:

• Birth record of the groom
• Death record of the groom's father
• Birth record of the bride
• Death record of the bride's mother
• A note that the death of the groom's paternal grandfather has been attested to under oath (probably because the death record could not be found and/or the groom didn't know where he died)

The third page is nothing; the fourth page is the witnesses (four; probably not related) and the signatures of all who could sign (the bride didn't sign because she was illiterate)

The processetti are available and are in a separate folder (https://www.antenati.san.beniculturali.it/detail-registry/?s_id=1546565). It appears after taking a quick look that there is a cover page with each set that corresponds to the number of the promessa, and that they are in reverse numerical order, starting with 51 and counting down (you're lucky - sometimes they are wildly out of order). I found the cover page for the package relating to this marriage starting on image 347. The contents are as follows:

• 348-350 is the return copy of the promessa. The certification from the priest is at the bottom of 350.
• 351-352 is a handwritten copy of the groom's birth record from 1809. It's number 141, so you could go to the 1809 Sala births and look up the original typseset form rather than muddling through the script.
• 353-354 is a handwritten copy of the groom's father's death record in Sala, #72(?) from 1827.
• 355-356 is an extract of the bride's birth record from Gragnano. You could go to the Gragnano (Napoli province) records and look up the actual record; she was born 19 Jan 1811. Note that her full birth name is Maria Carolina Pecori.
• 357-358 is a handwritten copy of the bride's mother's death record in Sala, #74 in 1825.