Using FHF 90-5 instead of ETA 2483 for Tudors?

[hologramet]

I just found a dealer that had NOS FHF 90-5 and it seemed very similar, almost ridiculously similar to ETA.

And it still seems very-very similar. Am I missing something? Can these be used?

Wait... now I get it. Unitas FHF and AS became ETA.

Fig. 1 Fig. 2 Fig. 3

FHF 905 Features automatic sweep second date: quickset Data 11.5''', Dm= 25.6mm, Do= 26.0mm H= 5.4mm F= 1.45mm T= 1.9mm 17/25 jewels f = 21600 A/h power reserve 43h Balance staff U3440 Stem W3352 Mainspring / battery 1.20 x 10.0 x 0.105mm Hands 1.50 x 0.90 x 0.25mm Comments abo

 

Technical data: FHF 90-5

• 17/25 jewels, Automatic wind, center second, date, quickset.
• Size: 11.5'''  25.6 mm.
• H: = 5.4 mm.
• N: = 18.000 A/h.
• Power reserve: 43 h.

Versions:

• 90-4:     date.  
• 90-5:     date.
• 90-9:     day, date.
• 905:      minor modifications, date.
• 908:      minor modifications, day, date.

Fig. 1 Fig. 2 Fig. 3

ETA 2451 Features automatic sweep second Data 11.5''', Dm= 25.6mm, Do= 26.0mm H= 5.3mm F= 1.4mm T= 1.85mm 17/21/25/30 jewels f = 18000 A/h power reserve 42h Balance staff U2226 / U3136 for balance with/without screws Stem W2426, W3226 Mainspring / battery Zf869, 1.30 x 9.5 x 0.105 x 300mm Hands 1.50 x 0.90 x 0.21mm Comments about

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Accoring to the source, it's even 18k bph. So... the small small difference 0.1 mm here and there... Can they be used?

[alligoat]

that FHF 905 looks like it would work- similar to the 2846-2 only no day feature. Hand sizes are good.

The 2451 would work but finding a .21 seconds hand could be tricky- maybe you could crimp something down.

[hologramet]

So... 6 pcs of NOS FHF 90-5 might come handy...

[walls-place]

hi you have an extra 90-5 ? how much are you asking for it? is it a quickset movement ?

[lorenzo1910]

Interesting thread... I just bough a watch only to rip off his 2846...

[walls-place]

are the movements -905 and 2846 the same then?

 

[lorenzo1910]

4 hours ago, walls-place said:

are the movements -905 and 2846 the same then?

 

I don't think so... but they have very similar size (the thickness is 5.2mm for the 2846 vs. 5.4mm for FHF 905... the other size are the same) Furthermore the 2846 is a day-date whereas the FHF 905 is date only (there are some 2846 variants without the day wheel)

My interest was to see where I could fit these movement (in which case)...

Edit:

the stem height is different... 1.9mm for FHF vs 2.25mm for ETA