Noodling finds

[JeffH]

My lucky day yesterday. I went to the bank to pick up some coinsafe bags and the teller at the next station asked me if I wanted some 50¢. They were deposited by the man she was still serving. Chap I know who lives just down the road from me.
The coins were ones accumulated by his elderly mother. I walked out with $400 to noodle.

The newest coin in this lot was a 1997.
I now have a pile of 1994 Year of Family and 1992 Commonwealth games in EF to UNC condition as well as a few other commemoratives. Also some similar Coat of Arms including two 1985 and a 1993 as well as a 1992. And eight good double bars. I was hoping for a few ramsheads and tall ships but none of those.

That's my kind of noodling. :yahoo:

[Unicorn]

That's a God-send noodle Jeff!!! :good: Top stuff!

You're very fortunate to be known and liked by the tellers!

[Unicorn]

Afterthought:

Do you have an accurate set of scales? (ie: to 00:00g)

If so and you have the time could you weigh the 1994's?

I've got a light one, (to the point you can feel it), but there does seem to be a lot of variance to the "correct weight" with the 1994s.

The ring test on the light one is excellent, but more to come once I've done my research.

Oh, many wide dates?

[JeffH]

Perhaps over the weekend -busy day today. Normal (narrow) date or wide date?
I do have quite a number of each now.

You're very fortunate to be known and liked by the tellers!

I buy them a box of chocolates when I get an extra good find from their coins and a box of chocolates at Christmas. I am sure that helps.
Interesting that all the staff at our local CBA are women.

[Unicorn]

There's certainly no rush .... just curious .... I've had it for ages now and have slowly been accumulating weight stats (just for you Herc).

(I seem to take forever to get stuff sorted lately ..... 2 many things on the 2 do list).

Chocs sound like a good plan!!!

Yes all my local CBA's staff are women too ..... there was one elderly gent a while back but he had a lot in common with teats on a bull.

[Pedro]

Great haul Jeff!:ok:

Pedro

[JeffH]

Hi Uni,
Had time after all. A job I had booked for 2pm that I expected to take 1½-2 hours took literally only a few minutes. Took me longer to drive halfway across (a very small) town than it to find and fix the problem. A guest had unplugged the masthead amplifier to plug in their phone charger and didn't plug it back in!

I measured three batches of five coins each of narrow and wide date and calculated mean mass. Then I measured each coin, from the lightest and heaviest batches, and also calculated mean.

Results are;
Narrow date. Batch totals (means) 77.25g (15.45g), 77.57g (15.51g), 77.51g (15.50g).
                        Individual coins ranged from 15.18 to 15.57g measured (mean of ten 15.47g).
                        Overall mean 15.49g.

Wide date. Batch totals (means) 77.39g (15.48g), 77.62g (15.52g), 77.59g (15.52g).
                    Individual coins ranged from 15.26 to 15.66g measured (mean of ten 15.50g).
                   Overall mean 15.51g.

Very little variance -I would think within planchet specifications.

The scale shows from 99.98 to 100.02g when calibrated with 100g test weight. Readings can vary by ±0.02g over a period (just when you think it has settled it will shift the last digit). So I would put accuracy of measurements as within ±0.05g. That is only ⅓% of the nominal mass of a 50¢ coins so these results should be fairly trustworthy. :grin:

[Unicorn]

Thanks heaps for doing that for me Jeff!

[JeffH]

What does your light one weigh in at Uni?

Do you have vernier calipers or a micrometer? I would be interested to know what the thickness is. Or lay it flat with a normal coin either side and squint at it from the edge -the eye is quite good at picking small differences in level. You eyes should be good enough; at least they are probably as good as they ever will be after your previous drama!
Most copper based coin alloys are very similar density and I wonder if it is on a planchet intended for a similar sized, but thinner, coin.

[Unicorn]

I dug it out and weighed it again (had forgotten what it was) and it's 15.19 so one of yours is even lighter. Bugga. The lowest other one I had recorded was 15.30 with a high of 15.66 oh well, nothing too special though I do still like the different ring to it.

[iankw]

hi i've only recently started looking at coins but came across a 1978 20c coin that has no visible sd mark.  Is that common?

[JeffH]

Firstly Ian (I presume), :welcome: to the forum.

I will kick this off with what I know and see what others think.
•Not mentioned in Renniks or Maccas so unlikely to be a recognised variety. I have no recollection of a "no SD" being mentioned previously.
•I just checked twelve of these (high grade noodling finds) and found two without a discernible SD. Some others had very faint SD or part missing.

So probably not that uncommon.

It could be a die fill. Any chance of a photo?

[iankw]

Firstly Ian (I presume), :welcome: to the forum.

I will kick this off with what I know and see what others think.
•Not mentioned in Renniks or Maccas so unlikely to be a recognised variety. I have no recollection of a "no SD" being mentioned previously.
•I just checked twelve of these (high grade noodling finds) and found two without a discernible SD. Some others had very faint SD or part missing.

So probably not that uncommon.

It could be a die fill. Any chance of a photo?

Thanks Jeff, sorry i haven't been able to work out the attachment thing yet.

[JeffH]

Go to to top of a page and click on Gallery . That's the easiest way to get a picture here and the forum linking code is available from the picture listing in the gallery.

[JeffH]

When I saw this one I thought it was die damage but when I put it under the 'scope it looks more like a planchet flaw.
2004 $1.