The following are three sample documents such as those you might recieve as part of your personal genealogical research request. Two are from Ponce and the other is from Yauco. Bear in mind that the actual condition of the records vary depending on how well they were stored, cared after, paper and ink used to create them, not to mention the ravages of time.
The record below is an 1774 Baptismal (bautismo) record from Coamo, Puerto Rico (Parroquia San Blas de Illescas).

This next record below is an 1780 Baptismal record (bautismo), from Yauco, Puerto Rico (Parroquia Santísimo Rosario).

The below record is an example of an 1915 Marriage (matrimonio) record from Ponce, Puerto Rico (Nuestra Senora de Guadalupe).