HP Forums

41CV has a silver keyboard border. It is from 1980.

Note the raised profile bevel on the F and the SHIFT keys.

Is the silver border keyboard label an early production CV possibility?

[attachment=11018]

The earliest CV know to exist, is actually 2103A10255 (corrected). This unit has the gold keyboard border and is a TallKey version.

(09-03-2022 06:31 AM)CY-CL Wrote: [ -> ]The earliest CV know to exist, is actually 2103A010255. This unit has the gold keyboard border and is a TallKey version.

Typo? 2103A010255 - 6 digits running no.?

(09-03-2022 06:31 AM)CY-CL Wrote: [ -> ]The earliest CV know to exist, is actually 2103A010255. This unit has the gold keyboard border and is a TallKey version.

See here my early 41CV :-)
This single tall gold key version seems unique.

This same machine has a gold keyboard border too and the embossed HP-41 CV logo as visible on my home page.

J-F

All Calculator with A0 in the Serial are HP-41C

All Calculator with A1 in the Serial are HP-41CV (Fullnut)

Yes the SN was a Typo

(09-03-2022 08:29 AM)CY-CL Wrote: [ -> ]All Calculator with A0 in the Serial are HP-41C

All Calculator with A1 in the Serial are HP-41CV (Fullnut)

I didn’t know that. Where did you get this information from?
And for the CX fullnut is it A2?

Many years of S/N research. :-)

HP-41CV

1981 : Starts with a 1, when more than 9999 units where build in one week, they starts with a 5

1982 – 1985 : Starts with a 4

1986 : Starts with a 2

HP-41CX

1983 – 1985 : All CX starts with a 4

(09-03-2022 10:00 AM)CY-CL Wrote: [ -> ]Many years of S/N research. :-)

HP-41CV

1982 – 1985 : Starts with a 4

I own 3 CVs with serial #: 2539S203**, 2541S200*, 2546S206*

(09-03-2022 10:40 AM)Massimo Gnerucci Wrote: [ -> ]

(09-03-2022 10:00 AM)CY-CL Wrote: [ -> ]Many years of S/N research. :-)

HP-41CV

1982 – 1985 : Starts with a 4

I own 3 CVs with serial #: 2539S203**, 2541S200*, 2546S206*

I talk from Fullnuts only ...

In 1985 the change from Full to Halfnuts was during week 22 up to week 26.

Interesting fact from the 1981 HP-41CV production are:

Production runs ins USA (A) from week 3 up to week 13

From week 14 all HP-41CV's where produced in Singapor (S)

(09-03-2022 10:48 AM)CY-CL Wrote: [ -> ]

(09-03-2022 10:40 AM)Massimo Gnerucci Wrote: [ -> ]I own 3 CVs with serial #: 2539S203**, 2541S200*, 2546S206*

I talk from Fullnuts only ...

In 1985 the change from Full to Halfnuts was during week 22 up to week 26.

Confirmed, all those 3 are halfnuts.
Thanks.

Thanks for these notes on the 41 serial numbers CY-CL!!

Despite the 41 very likely being the most thoroughly documented calculator in history, I still learn lots of new stuff about it here, like these s/n notes.

Also I've seen very few of the embossed label units; does anyone know why/when/where this was used for 41 production? I was once told this was a 3rd-party after-market item that was sold, but never confirmed.

(09-03-2022 10:48 AM)CY-CL Wrote: [ -> ]In 1985 the change from Full to Halfnuts was during week 22 up to week 26.

So I wonder the serial 2405S40422 I found and mentioned here of a halfnut I got lately and that was bought new and never serviced (relevant part of (German) communication attached). Weird. BTW: Fully working now.
Andi

If SN is *A0* it is a C.

If it has a silver border, then it is a C.

I recall border and chin logo being gold = CV or CX

Recently acquired the 41. Have read enough on this forum to wonder about it being a factory transition model or an HP repair mash-up.

So it started life as a C. Thanks all for the above data.

Need a spreadsheet to track the variations and have started one but it looks sparse.

(09-03-2022 03:44 PM)AndiGer Wrote: [ -> ]

(09-03-2022 10:48 AM)CY-CL Wrote: [ -> ]In 1985 the change from Full to Halfnuts was during week 22 up to week 26.

So I wonder the serial 2405S40422 I found and mentioned here of a halfnut I got lately and that was bought new and never serviced (relevant part of (German) communication attached). Weird. BTW: Fully working now.
Andi

Thanks Andi

This backside is from a Full Nut. Make a little bit research and you will find out wat is wrong on this 41. Good luck.

(09-03-2022 08:28 PM)TallKey Wrote: [ -> ]If it has a silver border, then it is a C.

I recall border and chin logo being gold = CV or CX

To confirm that, here is an extract of the HP Press Release for the 7 January 1981 HP-41CV announcement, published in PPC Journal - V8N1p15-16:

Quote:The HP-41CV also features special gold trim on the outside to convey the "top-of-the-line" quality.