Michael Weisel filed a will on October 3rd, 1757. He wrote "at this time sick and weak yet of sound understanding". But his will and probate records were filed on November 2nd, 1770 showing he recovered from his ailment(s) and lived another 13 years.

Michael's wife Susanna was included in the will of 1757 and she was mentioned along with her son Michael in the probate recorded dated November 2nd, 1770. Thus her death came after 11/2/1770.

Comment -- Michael Weisel in his 1757 will includes all his children by name except he referres to his oldest son as "my eldest Son". Jacob appears Michael's preferred son as Jacob inherits the plantation. In the Probate record filed after Michael's death on 11/2/1770 administration of the Estate is transferred from Susanna, Jacob, and "Eldest Son" to Michael's second son. It appears the family deliberately chose to not name the eldest son, who is Frederick Weisel/Wisely/Wiseley.

Source of the will (as of 1/9/2023):
     Pennsylvania, U.S., Wills and Probate Records, 1683-1993 for Michael Weisel
     Administration Files, No 75-115, 188, 2-5, 1770-1771
     Ancestry.com. Pennsylvania, U.S., Wills and Probate Records, 1683-1993
     https://www.ancestry.com/discoveryui-content/view/2339394:8802

Michael Weisel 1757 Will

[Translation] I Michael Weisel being at this time sick and weak but yet of sound understanding do hereby make my testament or last will in the words following.
First it is my will that after my decease my heirs do bury me in a Christian like manner and my soul I commend to the Lord God.
Secondly, it is my will that all the movable goods wherewith God has blessed me shall be of my wife Susanna and she shall keep the same in her hands during her life and do therewith as she pleases and she shall have her living in the house where we now dwell agreeable to the contract made between myself and my son Jacob Wysel.
Thirdly it is my will that all my children so as they are herein mentioned shall have their hereditary shares in manner following: first my son Jacob Weisel shall have my plantation and for the same he shall give to his brothers and sisters their hereditary shares, first to my eldest son 50 pounds in May Fair to wit, the 27th of May 1758 he shall give him 25 pounds and the 27th of May 1759 again 25 pounds which shall be his full hereditary share. Then to my second son Michael he shall give the 27th of May 1760 25 pounds and the 27th of May 1761 again 25 pounds which shall be his full hereditary share. Thirdly, to my eldest daughter Abolonia I do bequeath her hereditary portion as followeth to wit my son Jacob Weisel shall 1768 May 27th pay unto George Heintz the son of Andorry Heintz 25 pounds which shall be divided in equal parts among the children of Andorry Heintz and it is my will that my daughter Abolonia shall have in money one shilling sterling to be paid her by Jacob Weisel on the 27th of May 1769 which shall be her hereditary portion.
Fourthly my son Jacob Weisel shall give to his brother George Weisel 50 pounds in two equal payments, the first payment to be made the 27th of May 1764 to wit 25 pounds and on the 27th of May 1765 again 25 pounds which shall be his hereditary share.
Fifthly my daughter Barbara shall have 50 pounds in two equal payments 1766 the 27th of May she shall have 25 pounds and 1767 the 27th of May again 25 pounds which shall be her hereditary portion.
Sixthly the child of my deceased daughter left behind her now living with her father George Wildanger, her name is Magdalena, shall instead of my youngest daughter deceased, have her hereditary portion of 50 pounds which money has been fully paid to George Wildanger and he, George Wildanger shall pay that 50 pounds to that child in two payments, on the 27th day of November 1770 he shall pay 25 pounds to that child and 1771 again 25 pounds which shall be the child's hereditary portion and it is my will that my son Michael Weisel shall be the guardian of the above named child and have in his keeping until she cometh to age the bonds belonging to that child and given for the use of the said child by her father George Wildanger

which is my will wrote by me Michael Weisel and sealed and signed the 3rd of October in the year 1757.

Michael Wisel [seal]
Present witnesses -- Jacob x Wysel
Johanne Wurman John Keiffer

Louis Weiss of the city of Philadelphia, a scrivener, maketh oath that the foregoing is a true translation of an original writing in the German language purporting to be the last will and testament of Michael Weisel deceased now remaining in the Register General Office at Philadelphia and that from the same original he the deponent has made and therewith compared the said translation as further saith not. Sworn the 17th day of July 1770 before me Benjamin Chew, Reg. Genl.

Register of Wills In and For the County of Philadelphia Pennsylvania
IN THE MATTER OF THE ESTATE OF Michael Weisel
Will No. 188 Deceased Year 1770
Certified Copy of Book #N Page 335
The LAST WILL and TESTAMENT
RONALD R. DONATUCCI
REGISTER OF WILLS