I know the general consensus is that M. J. Tobias watches are regarded as Swiss fakes trading in on the M. I. Tobias name, however I wish to be a dissenter and put forward a case for both names being of the same Tobias family of Liverpool watchmakers.
Michael Isaac Tobias "watchmaker" is listed regularly in Liverpool directories from 1805 until the 1860's. Samuel Isaac Tobias also appears a couple of times 1811/14. Michael is usually listed as Miel Isaac Tobias. He had 8 children, 4 boys and 4 girls. Most of the boys were involved in the business at some time, though his 2nd son George Woolf Tobias appears to have outlived the others and succeeded his father as head after Michael's death in 1838.
The youngest son Edmund Myer Tobias was listed as a watchmaker with the firm in 1847, but appears to have left shortly after with business interests in Australia. A copy of his Marriage announcement appeared in the Sydney Morning Herald on the 20th May 1858, proclaiming him the "youngest son of "M. J. Tobias" Esq of Liverpool.
So is the "M. J." a coincidental typo by the printer? I don't believe so. I think the Michael (Miel) Isaac Tobias, or M.I. Tobias was the anglicised version used for his commercial interests. To friends and family he used the traditional Hebrew form of Myer Jitzhak Tobias, Isaac being an English version of Yitzhaq, Jitzhak or Ischakk.
A search on the British online newspaper archive gets more hits for M. J. Tobias than M. I. Tobias. (These are usually family notices). Even S. I. Tobias appears to have favoured S. J. Tobias in private matters.
The very first entry in the commercial directories (1805) is Miel J. Tobias, changed to Miel I.Tobias in subsequent years.
The first mention of a M.J. Tobias watch in Australian newspapers appears in 1852, so they have been produced since at least 1850. George Woolf Tobias was still commissioning high quality M.I. Tobias watches, but it is likely either he, his son (another Myer Isaac Tobias) or other family members had set up a Swiss manufacturing arm for high volume Swiss Ebauche pieces. This was not unusual, Samuel and Moyses Woog of Finsbury circus, London were wholesale watch manufacturers during the 1850s whose plant was in Chaux Le Fonds, Switzerland.
By 1865 George was described as a merchant and not a watchmaker, his son Myer a Cotton broker, which may explain why the vast majority of watches were destined for the American market.
By 1868 all signs of the company had disappeared in Liverpool. George still lived there, Myer may have moved to the U.S., being a cotton trader and watch supplier would have been complimentary business's. Of course there were four sisters and other brothers, so it is more than possible some of their children became involved in the business. Even if the company was sold to an outside party that continued to manufacture the Swiss watches, these could not be considered fakes. What is difficult to discover is if the M.J. Tobias watches carry the name of the original Meyer Tobias or his grandson successor.
Michael Isaac Tobias "watchmaker" is listed regularly in Liverpool directories from 1805 until the 1860's. Samuel Isaac Tobias also appears a couple of times 1811/14. Michael is usually listed as Miel Isaac Tobias. He had 8 children, 4 boys and 4 girls. Most of the boys were involved in the business at some time, though his 2nd son George Woolf Tobias appears to have outlived the others and succeeded his father as head after Michael's death in 1838.
The youngest son Edmund Myer Tobias was listed as a watchmaker with the firm in 1847, but appears to have left shortly after with business interests in Australia. A copy of his Marriage announcement appeared in the Sydney Morning Herald on the 20th May 1858, proclaiming him the "youngest son of "M. J. Tobias" Esq of Liverpool.

So is the "M. J." a coincidental typo by the printer? I don't believe so. I think the Michael (Miel) Isaac Tobias, or M.I. Tobias was the anglicised version used for his commercial interests. To friends and family he used the traditional Hebrew form of Myer Jitzhak Tobias, Isaac being an English version of Yitzhaq, Jitzhak or Ischakk.
A search on the British online newspaper archive gets more hits for M. J. Tobias than M. I. Tobias. (These are usually family notices). Even S. I. Tobias appears to have favoured S. J. Tobias in private matters.
The very first entry in the commercial directories (1805) is Miel J. Tobias, changed to Miel I.Tobias in subsequent years.
The first mention of a M.J. Tobias watch in Australian newspapers appears in 1852, so they have been produced since at least 1850. George Woolf Tobias was still commissioning high quality M.I. Tobias watches, but it is likely either he, his son (another Myer Isaac Tobias) or other family members had set up a Swiss manufacturing arm for high volume Swiss Ebauche pieces. This was not unusual, Samuel and Moyses Woog of Finsbury circus, London were wholesale watch manufacturers during the 1850s whose plant was in Chaux Le Fonds, Switzerland.
By 1865 George was described as a merchant and not a watchmaker, his son Myer a Cotton broker, which may explain why the vast majority of watches were destined for the American market.
By 1868 all signs of the company had disappeared in Liverpool. George still lived there, Myer may have moved to the U.S., being a cotton trader and watch supplier would have been complimentary business's. Of course there were four sisters and other brothers, so it is more than possible some of their children became involved in the business. Even if the company was sold to an outside party that continued to manufacture the Swiss watches, these could not be considered fakes. What is difficult to discover is if the M.J. Tobias watches carry the name of the original Meyer Tobias or his grandson successor.